diff --git a/Makefile b/Makefile
index d5f09f17..e4e29b64 100644
--- a/Makefile
+++ b/Makefile
@@ -42,7 +42,7 @@ OBJS = swad_account.o swad_action.o swad_announcement.o swad_assignment.o swad_a
        swad_QR.o \
        swad_record.o swad_role.o swad_RSS.o \
        swad_scope.o swad_search.o swad_session.o swad_setup.o swad_statistic.o swad_string.o swad_survey.o swad_syllabus.o \
-       swad_test.o swad_test_import.o swad_theme.o swad_timetable.o \
+       swad_tab.o swad_test.o swad_test_import.o swad_theme.o swad_timetable.o \
        swad_user.o \
        swad_web_service.o \
        swad_xml.o \
diff --git a/swad_action.c b/swad_action.c
index 1fe31e52..b5c8ac08 100644
--- a/swad_action.c
+++ b/swad_action.c
@@ -59,6 +59,7 @@
 #include "swad_QR.h"
 #include "swad_search.h"
 #include "swad_setup.h"
+#include "swad_tab.h"
 #include "swad_test_import.h"
 #include "swad_zip.h"
 
@@ -1050,7 +1051,7 @@ Profile:
 	904. ActDowBrf			Download a file in the briefcase
 */
 
-const struct Act_Menu Act_Menu[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB] =
+const struct Act_Menu Act_Menu[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB] =
 	{
 		// TabUnk **********
 		{
@@ -3550,7 +3551,7 @@ bool Act_CheckIfIHavePermissionToExecuteAction (Act_Action_t Action)
 
 const char *Act_GetTitleAction (Act_Action_t Action)
   {
-   extern const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const char *Txt_MENU_TITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
 
    if (Action < 0 || Action >= Act_NUM_ACTIONS)
       return NULL;
@@ -3563,7 +3564,7 @@ const char *Act_GetTitleAction (Act_Action_t Action)
 
 const char *Act_GetSubtitleAction (Act_Action_t Action)
   {
-   extern const char *Txt_MENU_SUBTITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const char *Txt_MENU_SUBTITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
 
    if (Action < 0 || Action >= Act_NUM_ACTIONS)
       return NULL;
@@ -3576,8 +3577,8 @@ const char *Act_GetSubtitleAction (Act_Action_t Action)
 
 void Act_GetBreadcrumbStrForAction (Act_Action_t Action,bool HTML,char *BreadcrumbStr)
   {
-   extern const char *Txt_TABS_FULL_TXT[Act_NUM_TABS];
-   extern const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const char *Txt_TABS_FULL_TXT[Tab_NUM_TABS];
+   extern const char *Txt_MENU_TITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
    Act_Action_t Superaction = Act_Actions[Action].SuperAction;
    char *Arrow;
 
@@ -3732,7 +3733,7 @@ void Act_AdjustActionWhenNoUsrLogged (void)
       Gbl.CurrentAct = ActSeeCtyInf;
    else
       Gbl.CurrentAct = Cfg_DEFAULT_ACTION_WHEN_NO_USR_LOGGED;
-   Lay_SetCurrentTab ();
+   Tab_SetCurrentTab ();
   }
 
 /*****************************************************************************/
@@ -3763,7 +3764,7 @@ void Act_AdjustCurrentAction (void)
             break;
          default:
 	    Gbl.CurrentAct = ActFrmChgMyPwd;
-	    Lay_SetCurrentTab ();
+	    Tab_SetCurrentTab ();
             return;
         }
      }
@@ -3773,7 +3774,7 @@ void Act_AdjustCurrentAction (void)
       if (!Pwd_FastCheckIfPasswordSeemsGood (Gbl.Usrs.Me.LoginPlainPassword))
         {
          Gbl.CurrentAct = ActFrmChgMyPwd;
-         Lay_SetCurrentTab ();
+         Tab_SetCurrentTab ();
          return;
         }
 
@@ -3790,7 +3791,7 @@ void Act_AdjustCurrentAction (void)
             break;
          default:
 	    Gbl.CurrentAct = ActFrmUsrAcc;
-	    Lay_SetCurrentTab ();
+	    Tab_SetCurrentTab ();
             return;
         }
      }
@@ -3808,7 +3809,7 @@ void Act_AdjustCurrentAction (void)
             break;
          default:
 	    Gbl.CurrentAct = ActReqEdiRecCom;
-	    Lay_SetCurrentTab ();
+	    Tab_SetCurrentTab ();
             return;
         }
 
@@ -3825,7 +3826,7 @@ void Act_AdjustCurrentAction (void)
             break;
          default:
 	    Gbl.CurrentAct = ActReqEdiMyIns;
-	    Lay_SetCurrentTab ();
+	    Tab_SetCurrentTab ();
             return;
         }
 
@@ -3837,7 +3838,7 @@ void Act_AdjustCurrentAction (void)
       if (!Gbl.Usrs.Me.UsrDat.Accepted && Gbl.CurrentAct != ActLogOut)
 	{
 	 Gbl.CurrentAct = ActReqAccEnrCrs;
-	 Lay_SetCurrentTab ();
+	 Tab_SetCurrentTab ();
 	 return;
 	}
 
@@ -3870,7 +3871,7 @@ void Act_AdjustCurrentAction (void)
                   if (Grp_NumGrpTypesMandatIDontBelong ())	// To do: if this query is too slow ==> put it only when login.
                     {
 	             Gbl.CurrentAct = ActReqSelGrp;
-	             Lay_SetCurrentTab ();
+	             Tab_SetCurrentTab ();
                      return;
 	            }
 
@@ -3884,7 +3885,7 @@ void Act_AdjustCurrentAction (void)
 	                   /* If limit of clicks has been reached,
 	                      the only action possible is show a form to send my photo */
 	                   Gbl.CurrentAct = ActReqMyPho;
-	                   Lay_SetCurrentTab ();
+	                   Tab_SetCurrentTab ();
                            return;
 	                 }
                   break;
@@ -3902,7 +3903,7 @@ void Act_AdjustCurrentAction (void)
                if (Tst_CheckIfCourseHaveTestsAndPluggableIsUnknown ())
                  {
                   Gbl.CurrentAct = ActCfgTst;
-                  Lay_SetCurrentTab ();
+                  Tab_SetCurrentTab ();
                   return;
                  }
             break;
@@ -4068,8 +4069,8 @@ void Act_WriteBigMFUActions (struct Act_ListMFUActions *ListMFUActions)
   {
    extern const char *The_ClassFormulNB[The_NUM_THEMES];
    extern const char *Txt_Frequent_actions;
-   extern const char *Txt_TABS_FULL_TXT[Act_NUM_TABS];
-   extern const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const char *Txt_TABS_FULL_TXT[Tab_NUM_TABS];
+   extern const char *Txt_MENU_TITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
    unsigned NumAct;
    Act_Action_t Action;
    const char *Title;
@@ -4120,7 +4121,7 @@ void Act_WriteBigMFUActions (struct Act_ListMFUActions *ListMFUActions)
 void Act_WriteSmallMFUActions (struct Act_ListMFUActions *ListMFUActions)
   {
    extern const char *Txt_Frequent_actions;
-   extern const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const char *Txt_MENU_TITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
    unsigned NumAct;
    Act_Action_t Action;
    const char *Title;
diff --git a/swad_action.h b/swad_action.h
index a3544672..87c804a4 100644
--- a/swad_action.h
+++ b/swad_action.h
@@ -69,8 +69,6 @@ typedef enum
 
 typedef int Act_Action_t;	// Must be a signed type, because -1 is used to indicate obsolete action
 
-/* Related with tabs, menus, etc. */
-#define Act_NUM_TABS	(1+11)
 #define Act_NUM_ACTIONS	(7+52+15+39+22+17+204+184+94+168+28+75)
 
 #define Act_MAX_ACTION_COD 1243
diff --git a/swad_changelog.h b/swad_changelog.h
index 066af90b..a9570bc2 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -35,11 +35,15 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 14.53.1 (2015/01/04)"
+#define Log_PLATFORM_VERSION	"SWAD 14.54 (2015/01/04)"
 
 // Number of lines (includes comments but not blank lines) has been got with the following command:
 // nl swad*.c swad*.h css/swad*.css py/swad*.py js/swad*.js soap/swad*.h | tail -1
 /*
+	Version 14.54    :Jan 04, 2014	New module swad_tab for drawing tabs. (173341 lines)
+					1 change necessary in Makefile:
+Add swad_tab.o to list of object files
+
 	Version 14.53.1  :Jan 04, 2014	Some functions moved from swad_layout to swad_menu. (173256 lines)
 	Version 14.53    :Jan 04, 2014	New module swad_calendar for drawing months and calendar. (173254 lines)
 					1 change necessary in Makefile:
diff --git a/swad_course.c b/swad_course.c
index be43c812..94d91543 100644
--- a/swad_course.c
+++ b/swad_course.c
@@ -43,6 +43,7 @@
 #include "swad_parameter.h"
 #include "swad_QR.h"
 #include "swad_RSS.h"
+#include "swad_tab.h"
 #include "swad_theme.h"
 
 /*****************************************************************************/
@@ -133,8 +134,8 @@ static void Crs_Configuration (bool PrintView)
   {
    extern const char *The_ClassFormul[The_NUM_THEMES];
    extern const char *Txt_This_course_fulfills_X_out_of_Y_indicators_;
-   extern const char *Txt_TABS_FULL_TXT[Act_NUM_TABS];
-   extern const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const char *Txt_TABS_FULL_TXT[Tab_NUM_TABS];
+   extern const char *Txt_MENU_TITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
    extern const char *Txt_Show_more_details;
    extern const char *Txt_NO;
    extern const char *Txt_Course;
@@ -539,7 +540,7 @@ static void Crs_WriteListMyCoursesToSelectOne (void)
   {
    extern const char *The_ClassFormul[The_NUM_THEMES];
    extern const char *Txt_My_courses;
-   extern const char *Txt_TABS_FULL_TXT[Act_NUM_TABS];
+   extern const char *Txt_TABS_FULL_TXT[Tab_NUM_TABS];
    extern const char *Txt_Go_to_X;
    struct Country Cty;
    struct Institution Ins;
diff --git a/swad_degree.c b/swad_degree.c
index 2ee6dfba..15c895ca 100644
--- a/swad_degree.c
+++ b/swad_degree.c
@@ -46,8 +46,9 @@
 #include "swad_QR.h"
 #include "swad_RSS.h"
 #include "swad_string.h"
-#include "swad_theme.h"
+#include "swad_tab.h"
 #include "swad_text.h"
+#include "swad_theme.h"
 
 /*****************************************************************************/
 /************** External global variables from others modules ****************/
@@ -627,7 +628,7 @@ static void Deg_WriteSelectorOfDegree (Act_Action_t NextAction)
 void Deg_WriteCtyInsCtrDeg (void)
   {
    extern const char *The_ClassDegree[The_NUM_THEMES];
-   extern const char *Txt_TABS_FULL_TXT[Act_NUM_TABS];
+   extern const char *Txt_TABS_FULL_TXT[Tab_NUM_TABS];
    char DegreeShortName[Deg_MAX_LENGTH_DEGREE_FULL_NAME+1];	// Full name of degree
 
    /***** Form to go to the system *****/
diff --git a/swad_layout.c b/swad_layout.c
index 78b2004e..ccf2e292 100644
--- a/swad_layout.c
+++ b/swad_layout.c
@@ -40,6 +40,7 @@
 #include "swad_notification.h"
 #include "swad_parameter.h"
 #include "swad_preference.h"
+#include "swad_tab.h"
 #include "swad_theme.h"
 #include "swad_web_service.h"
 
@@ -61,25 +62,9 @@ const char *Lay_LayoutIcons[Lay_NUM_LAYOUTS] =
   };
 
 /*****************************************************************************/
-/****************************** Private constants ****************************/
+/***************************** Private constants *****************************/
 /*****************************************************************************/
 
-const char *Lay_TabIcons[Act_NUM_TABS] =
-  {
-   /* TabUnk */	NULL,
-   /* TabSys */	"sys",
-   /* TabCty */	"cty",
-   /* TabIns */	"ins",
-   /* TabCtr */	"ctr",
-   /* TabDeg */	"deg",
-   /* TabCrs */	"crs",
-   /* TabAss */	"ass",
-   /* TabUsr */	"usr",
-   /* TabMsg */	"msg",
-   /* TabSta */	"sta",
-   /* TabPrf */	"prf",
-  };
-
 /*****************************************************************************/
 /******************************* Private types *******************************/
 /*****************************************************************************/
@@ -103,15 +88,7 @@ static void Lay_WriteScriptConnectedUsrs (void);
 static void Lay_WriteScriptCustomDropzone (void);
 
 static void Lay_WritePageTopHeading (void);
-static void Lay_DrawTabs (void);
-static void Lay_DrawTabsDeskTop (void);
-static void Lay_DrawTabsMobile (void);
-static bool Lay_CheckIfICanViewTab (Act_Tab_t Tab);
-static void Lay_DrawBreadcrumb (void);
 
-static void Lay_WriteBreadcrumbHome (void);
-static void Lay_WriteBreadcrumbTab (void);
-static void Lay_WriteBreadcrumbAction (void);
 static void Lay_WriteTitleAction (void);
 
 static void Lay_ShowLeftColumn (void);
@@ -313,7 +290,7 @@ void Lay_WriteStartOfPage (void)
             if (Gbl.CurrentAct == ActMnu)
                Mnu_WriteMenuThisTabMobile ();
             else
-               Lay_DrawTabsMobile ();
+               Tab_DrawTabsMobile ();
            }
          break;
       default:
@@ -730,7 +707,7 @@ static void Lay_WritePageTopHeading (void)
             Gbl.Prefs.PathTheme);
 
          /***** 3rd. row, 2nd. column *****/
-         Lay_DrawTabs ();
+         Tab_DrawTabs ();
 
          /***** 3rd. row, 3rd. column *****/
          if (Gbl.Prefs.SideCols & Lay_SHOW_RIGHT_COLUMN)	// Right column visible
@@ -754,7 +731,7 @@ static void Lay_WritePageTopHeading (void)
            }
          break;
       case Lay_LAYOUT_MOBILE:
-         Lay_DrawTabs ();
+         Tab_DrawTabs ();
          fprintf (Gbl.F.Out,"</tr>"
                             "<tr>");
          break;
@@ -763,414 +740,6 @@ static void Lay_WritePageTopHeading (void)
      }
   }
 
-/*****************************************************************************/
-/*************** Set current tab depending on current action *****************/
-/*****************************************************************************/
-
-void Lay_SetCurrentTab (void)
-  {
-   Gbl.CurrentTab = Act_Actions[Gbl.CurrentAct].Tab;
-
-   /***** Change action and tab if country, institution, centre or degree
-          are incompatible with the current tab *****/
-   switch (Gbl.CurrentTab)
-     {
-      case TabCty:
-	 if (Gbl.CurrentCty.Cty.CtyCod <= 0)		// No country selected
-	    Gbl.CurrentAct = ActSeeCty;
-	 break;
-      case TabIns:
-	 if (Gbl.CurrentIns.Ins.InsCod <= 0)		// No institution selected
-	   {
-	    if (Gbl.CurrentCty.Cty.CtyCod > 0)		// Country selected, but no institution selected
-	       Gbl.CurrentAct = ActSeeIns;
-	    else					// No country selected
-	       Gbl.CurrentAct = ActSeeCty;
-	  }
-	break;
-      case TabCtr:
-	 if (Gbl.CurrentCtr.Ctr.CtrCod <= 0)		// No centre selected
-	   {
-	    if (Gbl.CurrentIns.Ins.InsCod > 0)		// Institution selected, but no centre selected
-	       Gbl.CurrentAct = ActSeeCtr;
-	    else if (Gbl.CurrentCty.Cty.CtyCod > 0)	// Country selected, but no institution selected
-	       Gbl.CurrentAct = ActSeeIns;
-	    else					// No country selected
-	       Gbl.CurrentAct = ActSeeCty;
-	   }
-         break;
-      case TabDeg:
-         if (Gbl.CurrentDeg.Deg.DegCod <= 0)		// No degree selected
-	   {
-	    if (Gbl.CurrentCtr.Ctr.CtrCod > 0)		// Centre selected, but no degree selected
-	       Gbl.CurrentAct = ActSeeDeg;
-	    else if (Gbl.CurrentIns.Ins.InsCod > 0)	// Institution selected, but no centre selected
-	       Gbl.CurrentAct = ActSeeCtr;
-	    else if (Gbl.CurrentCty.Cty.CtyCod > 0)	// Country selected, but no institution selected
-	       Gbl.CurrentAct = ActSeeIns;
-	    else					// No country selected
-	       Gbl.CurrentAct = ActSeeCty;
-	   }
-         break;
-      default:
-         break;
-     }
-   Gbl.CurrentTab = Act_Actions[Gbl.CurrentAct].Tab;
-
-   Lay_DisableIncompatibleTabs ();
-  }
-
-/*****************************************************************************/
-/************************** Disable incompatible tabs ************************/
-/*****************************************************************************/
-
-void Lay_DisableIncompatibleTabs (void)
-  {
-   /***** Set country, institution, centre, degree and course depending on the current tab.
-          This will disable tabs incompatible with the current one. *****/
-   switch (Gbl.CurrentTab)
-     {
-      case TabSys:
-	 Gbl.CurrentCty.Cty.CtyCod = -1L;
-	 // no break
-      case TabCty:
-	 Gbl.CurrentIns.Ins.InsCod = -1L;
-	 // no break
-      case TabIns:
-	 Gbl.CurrentCtr.Ctr.CtrCod = -1L;
-	 // no break
-      case TabCtr:
-	 Gbl.CurrentDeg.Deg.DegCod = -1L;
-	 // no break
-      case TabDeg:
-	 Gbl.CurrentCrs.Crs.CrsCod = -1L;
-	 break;
-      default:
-         break;
-     }
-  }
-
-/*****************************************************************************/
-/**************** Draw tabs with the current tab highlighted *****************/
-/*****************************************************************************/
-
-static void Lay_DrawTabs (void)
-  {
-   unsigned ColspanCentralPart = 3;
-
-   if (Gbl.Prefs.Layout == Lay_LAYOUT_DESKTOP)
-     {
-      if (Gbl.Prefs.SideCols == Lay_SHOW_BOTH_COLUMNS)	// 11: both side columns visible, left and right
-	 ColspanCentralPart = 1;
-      else if (Gbl.Prefs.SideCols != Lay_HIDE_BOTH_COLUMNS)	// 10 or 01: only one side column visible, left or right
-	 ColspanCentralPart = 2;
-     }
-   fprintf (Gbl.F.Out,"<td colspan=\"%u\" style=\"height:56px;"
-	              " text-align:center; vertical-align:top;"
-		      " background-image: url('%s/head_base_background_1x56.gif');"
-		      " background-repeat:repeat-x;\">"
-		      "<div id=\"tabs_container\">",
-            ColspanCentralPart,Gbl.Prefs.PathTheme);
-   switch (Gbl.Prefs.Layout)
-     {
-      case Lay_LAYOUT_DESKTOP:
-         Lay_DrawTabsDeskTop ();
-         break;
-      case Lay_LAYOUT_MOBILE:
-         Lay_DrawBreadcrumb ();
-         break;
-      default:
-      	 break;
-     }
-   fprintf (Gbl.F.Out,"</div>"
-	              "</td>");
-  }
-
-/*****************************************************************************/
-/**************** Draw tabs with the current tab highlighted *****************/
-/*****************************************************************************/
-
-static void Lay_DrawTabsDeskTop (void)
-  {
-   extern const char *The_ClassTabOn[The_NUM_THEMES];
-   extern const char *The_ClassTabOff[The_NUM_THEMES];
-   extern const char *The_TabOnBgColors[The_NUM_THEMES];
-   extern const char *The_TabOffBgColors[The_NUM_THEMES];
-   extern const char *Txt_TABS_FULL_TXT[Act_NUM_TABS];
-   extern const char *Txt_TABS_SHORT_TXT[Act_NUM_TABS];
-   Act_Tab_t NumTab;
-   bool ICanViewTab;
-
-   /***** Table start *****/
-   fprintf (Gbl.F.Out,"<ul style=\"list-style-type:none; padding:0; margin:0;\">");
-
-   /***** Draw the tabs *****/
-   for (NumTab = (Act_Tab_t) 1;
-        NumTab <= (Act_Tab_t) Act_NUM_TABS - 1;
-        NumTab++)
-     {
-      ICanViewTab = Lay_CheckIfICanViewTab (NumTab);
-
-      /* If current tab is unknown, then activate the first one with access allowed */
-      if (Gbl.CurrentTab == TabUnk)
-	{
-	 Gbl.CurrentTab = NumTab;
-	 Lay_DisableIncompatibleTabs ();
-	}
-
-      if (ICanViewTab || NumTab > TabCrs)	// Don't show the first hidden tabs
-	{
-	 /* Form, icon (at top) and text (at bottom) of the tab */
-	 fprintf (Gbl.F.Out,"<li class=\"%s\" style=\"background-color:%s;\">",
-		  NumTab == Gbl.CurrentTab ? "TAB_ON" :
-					     "TAB_OFF",
-		  NumTab == Gbl.CurrentTab ? The_TabOnBgColors[Gbl.Prefs.Theme] :
-					     The_TabOffBgColors[Gbl.Prefs.Theme]);
-	 if (ICanViewTab)
-	   {
-	    fprintf (Gbl.F.Out,"<div");	// This div must be present even in current tab in order to render properly the tab
-	    if (NumTab != Gbl.CurrentTab)
-	       fprintf (Gbl.F.Out," class=\"ICON_HIGHLIGHT\"");
-	    fprintf (Gbl.F.Out,">");
-	    Act_FormStart (ActMnu);
-	    Par_PutHiddenParamUnsigned ("NxtTab",(unsigned) NumTab);
-	    Act_LinkFormSubmit (Txt_TABS_FULL_TXT[NumTab],
-				NumTab == Gbl.CurrentTab ? The_ClassTabOn[Gbl.Prefs.Theme] :
-							   The_ClassTabOff[Gbl.Prefs.Theme]);
-	    fprintf (Gbl.F.Out,"<img src=\"%s/%s/%s32x32.gif\""
-			       " alt=\"%s\" title=\"%s\""
-			       " class=\"ICON32x32\" style=\"margin:4px;\" />"
-			       "<div>%s</div>"
-			       "</a>"
-			       "</form>",
-		     Gbl.Prefs.PathIconSet,Cfg_ICON_ACTION_32x32,
-		     Lay_TabIcons[NumTab],
-		     Txt_TABS_FULL_TXT[NumTab],
-		     Txt_TABS_FULL_TXT[NumTab],
-		     Txt_TABS_SHORT_TXT[NumTab]);
-	   }
-	 else
-	    fprintf (Gbl.F.Out,"<div class=\"ICON_HIDDEN\">"
-			       "<img src=\"%s/%s/%s32x32.gif\""
-			       " alt=\"%s\" title=\"%s\""
-			       " class=\"ICON32x32\" style=\"margin:4px;\" />"
-			       "<div class=\"%s\">%s</div>",
-		     Gbl.Prefs.PathIconSet,Cfg_ICON_ACTION_32x32,
-		     Lay_TabIcons[NumTab],
-		     Txt_TABS_FULL_TXT[NumTab],
-		     Txt_TABS_FULL_TXT[NumTab],
-		     The_ClassTabOff[Gbl.Prefs.Theme],
-		     Txt_TABS_SHORT_TXT[NumTab]);
-
-	 fprintf (Gbl.F.Out,"</div>"
-			    "</li>");
-	}
-     }
-
-   /***** End of the table *****/
-   fprintf (Gbl.F.Out,"</ul>");
-  }
-
-/*****************************************************************************/
-/************************ Draw vertical menu with tabs ***********************/
-/*****************************************************************************/
-
-static void Lay_DrawTabsMobile (void)
-  {
-   extern const char *The_ClassMenuOff[The_NUM_THEMES];
-   extern const char *Txt_TABS_FULL_TXT[Act_NUM_TABS];
-   unsigned NumTabVisible;
-   Act_Tab_t NumTab;
-   bool ICanViewTab;
-
-   /***** Table start *****/
-   fprintf (Gbl.F.Out,"<table style=\"width:100%%;\">");
-
-   /***** Loop to write all tabs. Each row holds a tab *****/
-   for (NumTabVisible = 0, NumTab = (Act_Tab_t) 1;
-        NumTab <= (Act_Tab_t) Act_NUM_TABS - 1;
-        NumTab++)
-     {
-      ICanViewTab = Lay_CheckIfICanViewTab (NumTab);
-
-      if (ICanViewTab || NumTab > TabCrs)	// Don't show the first hidden tabs
-	{
-	 if (NumTabVisible % Cfg_LAYOUT_MOBILE_NUM_COLUMNS == 0)
-	    fprintf (Gbl.F.Out,"<tr>");
-
-	 /* Icon at top and text at bottom */
-	 fprintf (Gbl.F.Out,"<td style=\"width:25%%; text-align:center;"
-	                    " vertical-align:top;\">");
-	 if (ICanViewTab)
-	   {
-	    fprintf (Gbl.F.Out,"<div class=\"ICON_HIGHLIGHT\">");
-	    Act_FormStart (ActMnu);
-	    Par_PutHiddenParamUnsigned ("NxtTab",(unsigned) NumTab);
-	    Act_LinkFormSubmit (Txt_TABS_FULL_TXT[NumTab],The_ClassMenuOff[Gbl.Prefs.Theme]);
-	    fprintf (Gbl.F.Out,"<input type=\"image\" src=\"%s/%s/%s64x64.gif\""
-			       " alt=\"%s\" title=\"%s\" class=\"ICON64x64\""
-			       " style=\"margin:4px;\" />"
-			       "<div>%s</div>"
-			       "</a>"
-			       "</form>"
-			       "</div>",
-		     Gbl.Prefs.PathIconSet,Cfg_ICON_ACTION_64x64,
-		     Lay_TabIcons[NumTab],
-		     Txt_TABS_FULL_TXT[NumTab],
-		     Txt_TABS_FULL_TXT[NumTab],
-		     Txt_TABS_FULL_TXT[NumTab]);
-	   }
-	 else
-	    fprintf (Gbl.F.Out,"<div class=\"ICON_HIDDEN\">"
-			       "<img src=\"%s/%s/%s64x64.gif\""
-			       " alt=\"%s\" title=\"%s\""
-			       " class=\"ICON64x64\" style=\"margin:4px;\" />"
-			       "<div class=\"%s\">%s</div>"
-			       "</div>",
-		     Gbl.Prefs.PathIconSet,
-		     Cfg_ICON_ACTION_64x64,
-		     Lay_TabIcons[NumTab],
-		     Txt_TABS_FULL_TXT[NumTab],
-		     Txt_TABS_FULL_TXT[NumTab],
-		     The_ClassMenuOff[Gbl.Prefs.Theme],
-		     Txt_TABS_FULL_TXT[NumTab]);
-	 fprintf (Gbl.F.Out,"</td>");
-	 if ((NumTabVisible % Cfg_LAYOUT_MOBILE_NUM_COLUMNS) == (Cfg_LAYOUT_MOBILE_NUM_COLUMNS-1))
-	    fprintf (Gbl.F.Out,"</tr>");
-
-	 NumTabVisible++;
-	}
-     }
-
-   /***** End of the table *****/
-   fprintf (Gbl.F.Out,"</table>");
-  }
-
-/*****************************************************************************/
-/************************* Check if I can view a tab *************************/
-/*****************************************************************************/
-
-static bool Lay_CheckIfICanViewTab (Act_Tab_t Tab)
-  {
-   switch (Tab)
-     {
-      case TabUnk:
-	 return false;
-      case TabSys:
-	 return (Gbl.CurrentCty.Cty.CtyCod <= 0);
-      case TabCty:
-	 return (Gbl.CurrentCty.Cty.CtyCod > 0 &&
-	         Gbl.CurrentIns.Ins.InsCod <= 0);
-      case TabIns:
-	 return (Gbl.CurrentIns.Ins.InsCod > 0 &&
-	         Gbl.CurrentCtr.Ctr.CtrCod <= 0);
-      case TabCtr:
-	 return (Gbl.CurrentCtr.Ctr.CtrCod > 0 &&
-	         Gbl.CurrentDeg.Deg.DegCod <= 0);
-      case TabDeg:
-	 return (Gbl.CurrentDeg.Deg.DegCod > 0 &&
-	         Gbl.CurrentCrs.Crs.CrsCod <= 0);
-      case TabCrs:
-      case TabAss:
-	 return (Gbl.CurrentCrs.Crs.CrsCod > 0);
-      case TabMsg:
-	 return (Gbl.Usrs.Me.Logged ||
-	         Gbl.CurrentCrs.Crs.CrsCod > 0);
-      default:
-	 return true;
-     }
-  }
-
-/*****************************************************************************/
-/********************* Draw breadcrumb with tab and action *******************/
-/*****************************************************************************/
-
-static void Lay_DrawBreadcrumb (void)
-  {
-   extern const char *The_TabOnBgColors[The_NUM_THEMES];
-   extern const char *The_ClassTabOn[The_NUM_THEMES];
-
-   fprintf (Gbl.F.Out,"<div class=\"TAB_ON\" style=\"background-color:%s;\">",
-	    The_TabOnBgColors[Gbl.Prefs.Theme]);
-
-   /***** Home *****/
-   Lay_WriteBreadcrumbHome ();
-
-   if (Gbl.CurrentAct == ActMnu ||
-       Act_Actions[Act_Actions[Gbl.CurrentAct].SuperAction].IndexInMenu >= 0)
-     {
-      /***** Tab *****/
-      fprintf (Gbl.F.Out,"<span class=\"%s\"> &gt; </span>",
-               The_ClassTabOn[Gbl.Prefs.Theme]);
-      Lay_WriteBreadcrumbTab ();
-
-      if (Act_Actions[Act_Actions[Gbl.CurrentAct].SuperAction].IndexInMenu >= 0)
-        {
-         /***** Menu *****/
-         fprintf (Gbl.F.Out,"<span class=\"%s\"> &gt; </span>",
-                  The_ClassTabOn[Gbl.Prefs.Theme]);
-         Lay_WriteBreadcrumbAction ();
-        }
-     }
-
-   fprintf (Gbl.F.Out,"</div>");
-  }
-
-/*****************************************************************************/
-/************************ Write home in breadcrumb ***************************/
-/*****************************************************************************/
-
-static void Lay_WriteBreadcrumbHome (void)
-  {
-   extern const char *The_ClassTabOn[The_NUM_THEMES];
-   extern const char *Txt_Home_PAGE;
-
-   Act_FormStart (ActHom);
-   Act_LinkFormSubmit (Txt_Home_PAGE,The_ClassTabOn[Gbl.Prefs.Theme]);
-   fprintf (Gbl.F.Out,"%s</a>"
-	              "</form>",
-	    Txt_Home_PAGE);
-  }
-
-/*****************************************************************************/
-/************ Write icon and title associated to the current tab *************/
-/*****************************************************************************/
-
-static void Lay_WriteBreadcrumbTab (void)
-  {
-   extern const char *The_ClassTabOn[The_NUM_THEMES];
-   extern const char *Txt_TABS_FULL_TXT[Act_NUM_TABS];
-
-   /***** Start form *****/
-   Act_FormStart (ActMnu);
-   Par_PutHiddenParamUnsigned ("NxtTab",(unsigned) Gbl.CurrentTab);
-   Act_LinkFormSubmit (Txt_TABS_FULL_TXT[Gbl.CurrentTab],The_ClassTabOn[Gbl.Prefs.Theme]);
-
-   /***** Title and end of form *****/
-   fprintf (Gbl.F.Out,"%s</a>"
-	              "</form>",
-	    Txt_TABS_FULL_TXT[Gbl.CurrentTab]);
-  }
-
-/*****************************************************************************/
-/***************** Write title associated to the current action **************/
-/*****************************************************************************/
-
-static void Lay_WriteBreadcrumbAction (void)
-  {
-   extern const char *The_ClassTabOn[The_NUM_THEMES];
-   const char *Title = Act_GetTitleAction (Gbl.CurrentAct);
-
-   /***** Start form *****/
-   Act_FormStart (Act_Actions[Gbl.CurrentAct].SuperAction);
-   Act_LinkFormSubmit (Title,The_ClassTabOn[Gbl.Prefs.Theme]);
-
-   /***** Title and end of form *****/
-   fprintf (Gbl.F.Out,"%s</a>"
-	              "</form>",
-	    Title);
-  }
-
 /*****************************************************************************/
 /*********** Write icon and title associated to the current action ***********/
 /*****************************************************************************/
@@ -1179,7 +748,7 @@ static void Lay_WriteTitleAction (void)
   {
    extern const char *The_ClassTitleAction[The_NUM_THEMES];
    extern const char *The_ClassSubtitleAction[The_NUM_THEMES];
-   extern const char *Txt_TABS_FULL_TXT[Act_NUM_TABS];
+   extern const char *Txt_TABS_FULL_TXT[Tab_NUM_TABS];
 
    /***** Container start *****/
    fprintf (Gbl.F.Out,"<div id=\"action_title\""
diff --git a/swad_layout.h b/swad_layout.h
index 96e29a0d..10bc684a 100644
--- a/swad_layout.h
+++ b/swad_layout.h
@@ -86,9 +86,6 @@ typedef enum
 void Lay_WriteStartOfPage (void);
 void Lay_WriteTitle (const char *Title);
 
-void Lay_SetCurrentTab (void);
-void Lay_DisableIncompatibleTabs (void);
-
 void Lay_PutFormToEdit (Act_Action_t Action);
 void Lay_PutSendIcon (const char *Icon,const char *Alt,const char *Text);
 void Lay_PutSendButton (const char *TextSendButton);
diff --git a/swad_menu.c b/swad_menu.c
index 4423b592..9cecae55 100644
--- a/swad_menu.c
+++ b/swad_menu.c
@@ -1,4 +1,4 @@
-// swad_menu.h: menu (horizontal or vertical) selection
+// swad_menu.c: menu (horizontal or vertical) selection
 
 /*
     SWAD (Shared Workspace At a Distance),
@@ -33,6 +33,7 @@
 #include "swad_menu.h"
 #include "swad_parameter.h"
 #include "swad_preference.h"
+#include "swad_tab.h"
 
 /*****************************************************************************/
 /************** External global variables from others modules ****************/
@@ -42,7 +43,7 @@ extern struct Globals Gbl;
 extern struct Act_Actions Act_Actions[Act_NUM_ACTIONS];
 
 /*****************************************************************************/
-/******************************** Private constants **************************/
+/****************************** Private constants ****************************/
 /*****************************************************************************/
 
 #define MAX_MENU_ID 16
@@ -65,7 +66,6 @@ const char *Mnu_MenuIcons[Mnu_NUM_MENUS] =
    "vertical",
   };
 
-
 /*****************************************************************************/
 /************* Write the menu of current tab (desktop layout) ****************/
 /*****************************************************************************/
@@ -75,8 +75,8 @@ void Mnu_WriteVerticalMenuThisTabDesktop (void)
    extern const char *The_ClassMenuOn[The_NUM_THEMES];
    extern const char *The_ClassMenuOff[The_NUM_THEMES];
    extern const char *The_ClassSeparator[The_NUM_THEMES];
-   extern const struct Act_Menu Act_Menu[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
-   extern const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const struct Act_Menu Act_Menu[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const char *Txt_MENU_TITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
    unsigned NumOptInMenu;
    Act_Action_t NumAct;
    const char *Title;
@@ -166,8 +166,8 @@ void Mnu_WriteHorizontalMenuThisTabDesktop (void)
   {
    extern const char *The_ClassMenuOn[The_NUM_THEMES];
    extern const char *The_ClassMenuOff[The_NUM_THEMES];
-   extern const struct Act_Menu Act_Menu[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
-   extern const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const struct Act_Menu Act_Menu[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const char *Txt_MENU_TITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
    unsigned NumOptInMenu;
    Act_Action_t NumAct;
    const char *Title;
@@ -238,8 +238,8 @@ void Mnu_WriteMenuThisTabMobile (void)
   {
    extern const char *The_ClassMenuOn[The_NUM_THEMES];
    extern const char *The_ClassMenuOff[The_NUM_THEMES];
-   extern const struct Act_Menu Act_Menu[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
-   extern const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const struct Act_Menu Act_Menu[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
+   extern const char *Txt_MENU_TITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB];
    unsigned NumOptInMenu;
    unsigned NumOptVisible;	// Only options I can see
    Act_Action_t NumAct;
diff --git a/swad_parameter.c b/swad_parameter.c
index b5c23013..3c40fe30 100644
--- a/swad_parameter.c
+++ b/swad_parameter.c
@@ -36,6 +36,7 @@
 #include "swad_parameter.h"
 #include "swad_password.h"
 #include "swad_preference.h"
+#include "swad_tab.h"
 
 /*****************************************************************************/
 /*************** External global variables from others modules ***************/
@@ -149,7 +150,7 @@ void Par_GetMainParameters (void)
    if (Gbl.WebService.IsWebService)
      {
       Gbl.CurrentAct = ActWebSvc;
-      Lay_SetCurrentTab ();
+      Tab_SetCurrentTab ();
       return;
      }
 
@@ -159,7 +160,7 @@ void Par_GetMainParameters (void)
        Gbl.Imported.ExternalSesId[0])
      {
       Gbl.CurrentAct = ActAutUsrExt;
-      Lay_SetCurrentTab ();
+      Tab_SetCurrentTab ();
       return;
      }
    // SWAD is not called from external site
@@ -300,14 +301,14 @@ void Par_GetMainParameters (void)
       Par_GetParToText ("NxtTab",UnsignedStr,10);
       if (UnsignedStr[0])
 	 if (sscanf (UnsignedStr,"%u",&UnsignedNum) == 1)
-	    if (UnsignedNum < Act_NUM_TABS)
+	    if (UnsignedNum < Tab_NUM_TABS)
 	      {
 	       Gbl.CurrentTab = (Act_Tab_t) UnsignedNum;
-	       Lay_DisableIncompatibleTabs ();
+	       Tab_DisableIncompatibleTabs ();
 	      }
      }
    else	// Set tab depending on current action
-      Lay_SetCurrentTab ();
+      Tab_SetCurrentTab ();
   }
 
 /*****************************************************************************/
diff --git a/swad_statistic.c b/swad_statistic.c
index c9513101..ba219f5e 100644
--- a/swad_statistic.c
+++ b/swad_statistic.c
@@ -46,6 +46,7 @@
 #include "swad_notification.h"
 #include "swad_parameter.h"
 #include "swad_statistic.h"
+#include "swad_tab.h"
 #include "swad_web_service.h"
 
 /*****************************************************************************/
@@ -688,7 +689,7 @@ static void Sta_WriteSelectorAction (void)
   {
    extern const char *The_ClassFormul[The_NUM_THEMES];
    extern const char *Txt_Action;
-   extern const char *Txt_TABS_SHORT_TXT[Act_NUM_TABS];
+   extern const char *Txt_TABS_SHORT_TXT[Tab_NUM_TABS];
    Act_Action_t NumAction;
    char ActTxt[Act_MAX_LENGTH_ACTION_TXT+1];
 
diff --git a/swad_text.c b/swad_text.c
index f3c9204d..ab1b63b4 100644
--- a/swad_text.c
+++ b/swad_text.c
@@ -83,6 +83,7 @@
 #include "swad_statistic.h"
 #include "swad_survey.h"
 #include "swad_syllabus.h"
+#include "swad_tab.h"
 #include "swad_test.h"
 #include "swad_text.h"
 #include "swad_timetable.h"
@@ -15580,7 +15581,7 @@ const char *Txt_MENU_NAMES[Mnu_NUM_MENUS] =
 #endif
 	};
 
-const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB] =
+const char *Txt_MENU_TITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB] =
 {
 	{
 	// TabUnk ****************************************************
@@ -17394,7 +17395,7 @@ const char *Txt_MENU_TITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB] =
 	}
 };
 
-const char *Txt_MENU_SUBTITLE[Act_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB] =
+const char *Txt_MENU_SUBTITLE[Tab_NUM_TABS][Act_MAX_OPTIONS_IN_MENU_PER_TAB] =
 {
 	{
 	// TabUnk ****************************************************
@@ -36238,7 +36239,7 @@ const char *Txt_Table_not_found_in_the_file_of_marks =
 	"Table not found in the file of marks.";			// Necessita de tradução
 #endif
 
-const char *Txt_TABS_FULL_TXT[Act_NUM_TABS] =
+const char *Txt_TABS_FULL_TXT[Tab_NUM_TABS] =
    {
    // TabUnk
 	 NULL,
@@ -36474,7 +36475,7 @@ const char *Txt_TABS_FULL_TXT[Act_NUM_TABS] =
 #endif
 	};
 
-const char *Txt_TABS_SHORT_TXT[Act_NUM_TABS] =	// Must be visible in 1024x768 without horizontal scroll bar
+const char *Txt_TABS_SHORT_TXT[Tab_NUM_TABS] =	// Must be visible in 1024x768 without horizontal scroll bar
 	 {
 	 // TabUnk
 	   NULL,
diff --git a/swad_user.c b/swad_user.c
index 20a04224..32fb1ba1 100644
--- a/swad_user.c
+++ b/swad_user.c
@@ -50,6 +50,7 @@
 #include "swad_password.h"
 #include "swad_preference.h"
 #include "swad_record.h"
+#include "swad_tab.h"
 #include "swad_user.h"
 
 /*****************************************************************************/
@@ -614,7 +615,7 @@ static void Usr_GetMyLastData (void)
       /* Get last tab */
       Gbl.Usrs.Me.UsrLast.LastTab = TabPrf;        // By default, set last tab to the profile tab
       if (sscanf (row[2],"%u",&UnsignedNum) == 1)
-         if (UnsignedNum >= 1 || UnsignedNum <= Act_NUM_TABS)
+         if (UnsignedNum >= 1 || UnsignedNum <= Tab_NUM_TABS)
             Gbl.Usrs.Me.UsrLast.LastTab = (Act_Tab_t) UnsignedNum;
 
       /* Get last access to notifications */
@@ -1698,7 +1699,7 @@ void Usr_ChkUsrAndGetUsrData (void)
       if (Gbl.CurrentAct != ActRefCon)
 	{
 	 Gbl.CurrentAct = ActLogOut;
-	 Lay_SetCurrentTab ();
+	 Tab_SetCurrentTab ();
 	 Lay_ShowAlert (Lay_WARNING,Txt_The_session_has_expired_due_to_inactivity);
 	 PutFormLogin = true;
 	}
@@ -1800,7 +1801,7 @@ void Usr_ChkUsrAndGetUsrData (void)
 	    Gbl.CurrentTab = ((Gbl.Usrs.Me.UsrLast.LastTab == TabCrs) &&
 			      (Gbl.CurrentCrs.Crs.CrsCod <= 0)) ? TabSys :
 								  Gbl.Usrs.Me.UsrLast.LastTab;
-	    Lay_DisableIncompatibleTabs ();
+	    Tab_DisableIncompatibleTabs ();
 	   }
 	 Usr_UpdateMyLastData ();
 	 Crs_UpdateCrsLast ();