diff --git a/swad_changelog.h b/swad_changelog.h
index 91c404fde..3da02e93b 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -103,11 +103,12 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 14.123.5 (2015/07/31)"
+#define Log_PLATFORM_VERSION	"SWAD 14.123.6 (2015/08/01)"
 
 // 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 sql/swad*.sql | tail -1
 /*
+        Version 14.123.6: Aug 01, 2015	Changes in CSS of forms. (184874 lines)
         Version 14.123.5: Jul 31, 2015	Changes in CSS of forms. (184902 lines)
         Version 14.123.4: Jul 31, 2015	Changes in CSS of forms. (184905 lines)
         Version 14.123.3: Jul 28, 2015	Changes in CSS of forms. (184929 lines)
diff --git a/swad_enrollment.c b/swad_enrollment.c
index adce90b78..ee918a333 100644
--- a/swad_enrollment.c
+++ b/swad_enrollment.c
@@ -532,7 +532,7 @@ static void Enr_ShowFormRegRemSeveralUsrs (void)
    Lay_StartRoundFrame (NULL,Txt_Admin_several_users);
 
    /***** Step 1: List of students to be enrolled / removed *****/
-   fprintf (Gbl.F.Out,"<div class=\"%s\" style=\"text-align:left;\">"
+   fprintf (Gbl.F.Out,"<div class=\"%s LEFT_MIDDLE\">"
                       "%s"
                       "</div>",
             The_ClassTitle[Gbl.Prefs.Theme],
@@ -541,7 +541,7 @@ static void Enr_ShowFormRegRemSeveralUsrs (void)
    if (ExternalUsrsServiceAvailable)
      {
       /* Option a: get students from official lists */
-      fprintf (Gbl.F.Out,"<div class=\"%s\" style=\"text-align:left;\">"
+      fprintf (Gbl.F.Out,"<div class=\"%s LEFT_MIDDLE\">"
 			 "%s"
 			 "</div>",
 	       The_ClassTitle[Gbl.Prefs.Theme],
@@ -550,7 +550,7 @@ static void Enr_ShowFormRegRemSeveralUsrs (void)
       Imp_ListMyImpGrpsAndStdsForm ();
 
       /* Option b: get students' IDs from pasted text */
-      fprintf (Gbl.F.Out,"<div class=\"%s\" style=\"text-align:left;\">"
+      fprintf (Gbl.F.Out,"<div class=\"%s LEFT_MIDDLE\">"
 			 "%s"
 			 "</div>",
 	       The_ClassTitle[Gbl.Prefs.Theme],
@@ -561,7 +561,7 @@ static void Enr_ShowFormRegRemSeveralUsrs (void)
    Enr_PutAreaToEnterUsrsIDs ();
 
    /***** Step 2: Select type of user to register/remove to/from current course *****/
-   fprintf (Gbl.F.Out,"<div class=\"%s\" style=\"text-align:left;\">"
+   fprintf (Gbl.F.Out,"<div class=\"%s LEFT_MIDDLE\">"
                       "%s"
                       "</div>",
             The_ClassTitle[Gbl.Prefs.Theme],
@@ -570,7 +570,7 @@ static void Enr_ShowFormRegRemSeveralUsrs (void)
       Rol_PutAllRolesRegRemUsrsCrs ();
 
    /***** Step 3: Put different actions to register/remove students to/from current course *****/
-   fprintf (Gbl.F.Out,"<div class=\"%s\" style=\"text-align:left;\">"
+   fprintf (Gbl.F.Out,"<div class=\"%s LEFT_MIDDLE\">"
                       "%s"
                       "</div>",
             The_ClassTitle[Gbl.Prefs.Theme],
@@ -578,7 +578,7 @@ static void Enr_ShowFormRegRemSeveralUsrs (void)
    Enr_PutActionsRegRemSeveralUsrs ();
 
    /***** Step 4: Select groups in which register / remove students *****/
-   fprintf (Gbl.F.Out,"<div class=\"%s\" style=\"text-align:left;\">"
+   fprintf (Gbl.F.Out,"<div class=\"%s LEFT_MIDDLE\">"
                       "%s"
                       "</div>",
             The_ClassTitle[Gbl.Prefs.Theme],
@@ -600,7 +600,7 @@ static void Enr_ShowFormRegRemSeveralUsrs (void)
      }
 
    /***** Step 5: Confirm register / remove students *****/
-   fprintf (Gbl.F.Out,"<div class=\"%s\" style=\"text-align:left;\">"
+   fprintf (Gbl.F.Out,"<div class=\"%s LEFT_MIDDLE\">"
                       "%s"
                       "</div>",
             The_ClassTitle[Gbl.Prefs.Theme],
@@ -640,7 +640,7 @@ void Enr_AskRemoveOldUsrs (void)
    unsigned Months;
 
    /***** Form to request number of months without clicks *****/
-   fprintf (Gbl.F.Out,"<div style=\"text-align:center;\">");
+   fprintf (Gbl.F.Out,"<div class=\"CENTER_MIDDLE\">");
    Act_FormStart (ActRemOldUsr);
    fprintf (Gbl.F.Out,"<span class=\"%s\">%s </span>",
             The_ClassForm[Gbl.Prefs.Theme],
@@ -763,7 +763,7 @@ static void Enr_PutAreaToEnterUsrsIDs (void)
                       "<td class=\"%s RIGHT_TOP\">"
                       "%s:&nbsp;"
                       "</td>"
-                      "<td style=\"text-align:left;\">"
+                      "<td class=\"LEFT_TOP\">"
                       "<textarea name=\"UsrsIDs\" cols=\"72\" rows=\"10\">",
             The_ClassForm[Gbl.Prefs.Theme],
             Txt_List_of_nicks_emails_or_IDs);
@@ -2117,7 +2117,7 @@ void Enr_ShowEnrollmentRequests (void)
                       "<td class=\"%s RIGHT_MIDDLE\">"
                       "%s:"
                       "</td>"
-                      "<td style=\"text-align:left; vertical-align:middle;\">",
+                      "<td class=\"LEFT_MIDDLE\">",
             The_ClassForm[Gbl.Prefs.Theme],
             Txt_Scope);
    Gbl.Scope.Allowed = 1 << Sco_SCOPE_SYS |
@@ -2137,8 +2137,7 @@ void Enr_ShowEnrollmentRequests (void)
                       "<td class=\"%s RIGHT_TOP\">"
                       "%s:"
                       "</td>"
-                      "<td class=\"DAT\""
-                      " style=\"text-align:left; vertical-align:middle;\">",
+                      "<td class=\"DAT LEFT_MIDDLE\">",
             The_ClassForm[Gbl.Prefs.Theme],
             Txt_Users);
    Rol_GetSelectedRoles (&Roles);
@@ -2371,24 +2370,19 @@ void Enr_ShowEnrollmentRequests (void)
       Lay_StartRoundFrameTable (NULL,2,NULL);
       fprintf (Gbl.F.Out,"<tr>"
                          "<th></th>"
-                         "<th class=\"TIT_TBL\""
-                         " style=\"text-align:left; vertical-align:top;\">"
+                         "<th class=\"TIT_TBL LEFT_TOP\">"
                          "%s"
                          "</th>"
-                         "<th class=\"TIT_TBL\""
-                         " style=\"text-align:right; vertical-align:top;\">"
+                         "<th class=\"TIT_TBL RIGHT_TOP\">"
                          "%s"
                          "</th>"
-                         "<th colspan=\"2\" class=\"TIT_TBL\""
-                         " style=\"text-align:left; vertical-align:top;\">"
+                         "<th colspan=\"2\" class=\"TIT_TBL LEFT_TOP\">"
                          "%s"
                          "</th>"
-                         "<th class=\"TIT_TBL\""
-                         " style=\"text-align:left; vertical-align:top;\">"
+                         "<th class=\"TIT_TBL LEFT_TOP\">"
                          "%s"
                          "</th>"
-                         "<th class=\"TIT_TBL\""
-                         " style=\"text-align:center; vertical-align:top;\">"
+                         "<th class=\"TIT_TBL CENTER_TOP\">"
                          "%s"
                          "</th>"
                          "<th></th>"
@@ -2427,8 +2421,7 @@ void Enr_ShowEnrollmentRequests (void)
            {
             /***** Number *****/
             fprintf (Gbl.F.Out,"<tr>"
-                               "<td class=\"DAT\" style=\"text-align:right;"
-                               " vertical-align:top;\">"
+                               "<td class=\"DAT RIGHT_TOP\">"
                                "%u"
                                "</td>",
                      NumRequests - NumReq);
@@ -2437,8 +2430,7 @@ void Enr_ShowEnrollmentRequests (void)
             Crs_GetDataOfCourseByCod (&Crs);
             Deg.DegCod = Crs.DegCod;
             Deg_GetDataOfDegreeByCod (&Deg);
-            fprintf (Gbl.F.Out,"<td class=\"DAT\" style=\"text-align:left;"
-        	               " vertical-align:top;\">");
+            fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP\">");
             Act_FormGoToStart (ActSeeCrsInf);
             Crs_PutParamCrsCod (Crs.CrsCod);
             sprintf (Gbl.Title,Txt_Go_to_X,Crs.FullName);
@@ -2450,15 +2442,14 @@ void Enr_ShowEnrollmentRequests (void)
             fprintf (Gbl.F.Out,"</td>");
 
             /***** Number of teachers in the course *****/
-            fprintf (Gbl.F.Out,"<td class=\"DAT\" style=\"text-align:right;"
-        	               " vertical-align:top;\">"
+            fprintf (Gbl.F.Out,"<td class=\"DAT RIGHT_TOP\">"
                                "%u"
                                "</td>",
                      Crs.NumTchs);
 
             /***** User photo *****/
-            fprintf (Gbl.F.Out,"<td class=\"DAT\" style=\"width:18px;"
-        	               " text-align:center; vertical-align:top;\">");
+            fprintf (Gbl.F.Out,"<td class=\"DAT CENTER_TOP\""
+        	               " style=\"width:18px;\">");
             ShowPhoto = Pho_ShowUsrPhotoIsAllowed (&UsrDat,PhotoURL);
             Pho_ShowUsrPhoto (&UsrDat,ShowPhoto ? PhotoURL :
                         	                  NULL,
@@ -2466,14 +2457,12 @@ void Enr_ShowEnrollmentRequests (void)
             fprintf (Gbl.F.Out,"</td>");
 
             /***** User name *****/
-            fprintf (Gbl.F.Out,"<td class=\"DAT\" style=\"text-align:left;"
-        	               " vertical-align:top;\">");
+            fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP\">");
             Usr_RestrictLengthAndWriteName (&UsrDat,20);
 
             /***** Requested role (row[3]) *****/
             DesiredRole = Rol_ConvertUnsignedStrToRole (row[3]);
-            fprintf (Gbl.F.Out,"<td class=\"DAT\" style=\"text-align:left;"
-        	               " vertical-align:top;\">"
+            fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP\">"
         	               "%s"
         	               "</td>",
                      Txt_ROLES_SINGUL_abc[DesiredRole][UsrDat.Sex]);
@@ -2482,8 +2471,7 @@ void Enr_ShowEnrollmentRequests (void)
             Msg_WriteMsgDate (row[4],"DAT");
 
             /***** Button to confirm the request *****/
-            fprintf (Gbl.F.Out,"<td class=\"DAT\" style=\"text-align:left;"
-        	               " vertical-align:top;\">");
+            fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP\">");
             Act_FormStart (ActReqMdfUsr);
             Crs_PutParamCrsCod (Crs.CrsCod);
             Usr_PutParamUsrCodEncrypted (UsrDat.EncryptedUsrCod);
@@ -2492,8 +2480,7 @@ void Enr_ShowEnrollmentRequests (void)
             fprintf (Gbl.F.Out,"</td>");
 
             /***** Button to reject the request *****/
-            fprintf (Gbl.F.Out,"<td class=\"DAT\" style=\"text-align:left;"
-        	               " vertical-align:top;\">");
+            fprintf (Gbl.F.Out,"<td class=\"DAT LEFT_TOP\">");
             Act_FormStart (ActReqRejSignUp);
             Crs_PutParamCrsCod (Crs.CrsCod);
             Usr_PutParamUsrCodEncrypted (UsrDat.EncryptedUsrCod);
@@ -3409,7 +3396,7 @@ static void Enr_AskIfRemoveUsrFromCrs (struct UsrData *UsrDat,bool ItsMe)
 
       Rec_ShowCommonRecordUnmodifiable (UsrDat);
 
-      fprintf (Gbl.F.Out,"<div style=\"text-align:center;\">");
+      fprintf (Gbl.F.Out,"<div class=\"CENTER_MIDDLE\">");
       Act_FormStart (ActRemUsrCrs);
       Usr_PutParamUsrCodEncrypted (UsrDat->EncryptedUsrCod);
       Pwd_AskForConfirmationOnDangerousAction ();
diff --git a/swad_exam.c b/swad_exam.c
index c2934b0a2..89618de75 100644
--- a/swad_exam.c
+++ b/swad_exam.c
@@ -767,7 +767,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
    if (TypeViewExamAnnouncement == Exa_NORMAL_VIEW)
      {
       fprintf (Gbl.F.Out,"<tr>" \
-	                 "<td style=\"text-align:left;\">");
+	                 "<td class=\"LEFT_MIDDLE\">");
 
       if (Gbl.Usrs.Me.LoggedRole == Rol_TEACHER ||
 	  Gbl.Usrs.Me.LoggedRole == Rol_SYS_ADM)
@@ -793,7 +793,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
      }
 
    fprintf (Gbl.F.Out,"<tr>" \
-	              "<td style=\"text-align:center;\">");
+	              "<td class=\"CENTER_MIDDLE\">");
 
    if (TypeViewExamAnnouncement == Exa_FORM_VIEW)
      {
@@ -808,7 +808,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 
    /***** Institution logo *****/
    fprintf (Gbl.F.Out,"<tr>" \
-	              "<td colspan=\"2\" style=\"text-align:center;\">");
+	              "<td colspan=\"2\" class=\"CENTER_MIDDLE\">");
    if (TypeViewExamAnnouncement == Exa_PRINT_VIEW)
       fprintf (Gbl.F.Out,"<span class=\"%s\">",StyleTitle);
    else
@@ -824,8 +824,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 
    /***** Degree *****/
    fprintf (Gbl.F.Out,"<tr>" \
-	              "<td colspan=\"2\" class=\"%s\""
-	              " style=\"text-align:center;\">",
+	              "<td colspan=\"2\" class=\"%s CENTER_MIDDLE\">",
 	    StyleTitle);
    if (TypeViewExamAnnouncement == Exa_NORMAL_VIEW)
       fprintf (Gbl.F.Out,"<a href=\"%s\" target=\"_blank\" class=\"%s\">",
@@ -838,16 +837,14 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 
    /***** Title *****/
    fprintf (Gbl.F.Out,"<tr>" \
-	              "<td colspan=\"2\" class=\"%s\""
-	              " style=\"text-align:center;\">"
+	              "<td colspan=\"2\" class=\"%s CENTER_MIDDLE\">"
 	              "&nbsp;<br />"
 	              "<strong>%s</strong>"
 	              "</td>" \
 	              "</tr>",
             StyleNormal,Txt_EXAM_ANNOUNCEMENT);
    fprintf (Gbl.F.Out,"<tr>" \
-	              "<td colspan=\"2\" class=\"%s\""
-	              " style=\"text-align:left;\">"
+	              "<td colspan=\"2\" class=\"%s LEFT_MIDDLE\">"
 	              "&nbsp;"
 	              "</td>" \
 	              "</tr>",
@@ -858,8 +855,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Course,
             StyleNormal);
@@ -879,8 +875,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
                       "<td class=\"%s RIGHT_TOP\">"
                       "%s:"
                       "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Year,
             StyleNormal);
@@ -908,8 +903,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Session,
             StyleNormal);
@@ -931,7 +925,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
             Txt_EXAM_ANNOUNCEMENT_Exam_date);
    if (TypeViewExamAnnouncement == Exa_FORM_VIEW)
      {
-      fprintf (Gbl.F.Out,"<td style=\"text-align:left;\">");
+      fprintf (Gbl.F.Out,"<td class=\"LEFT_TOP\">");
       Dat_WriteFormDate (Gbl.ExamAnnouncement.ExamDate.Year < Gbl.Now.Date.Year ? Gbl.ExamAnnouncement.ExamDate.Year :
                                                                                   Gbl.Now.Date.Year,
                          Gbl.Now.Date.Year+1,
@@ -943,8 +937,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
    else
      {
       Dat_ConvDateToDateStr (&Gbl.ExamAnnouncement.ExamDate,StrExamDate);
-      fprintf (Gbl.F.Out,"<td class=\"%s\""
-	                 " style=\"text-align:left; vertical-align:top;\">"
+      fprintf (Gbl.F.Out,"<td class=\"%s LEFT_TOP\">"
 	                 "%s"
 	                 "</td>",
                StyleNormal,StrExamDate);
@@ -956,8 +949,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Start_time,
             StyleNormal);
@@ -1003,8 +995,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Approximate_duration,
             StyleNormal);
@@ -1067,8 +1058,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Place_of_exam,
             StyleNormal);
@@ -1089,8 +1079,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Mode,
             StyleNormal);
@@ -1111,8 +1100,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Structure_of_the_exam,
             StyleNormal);
@@ -1133,8 +1121,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Documentation_required,
             StyleNormal);
@@ -1155,8 +1142,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Material_required,
             StyleNormal);
@@ -1177,8 +1163,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,
             Txt_EXAM_ANNOUNCEMENT_Material_allowed,
             StyleNormal);
@@ -1199,8 +1184,7 @@ static void Exa_ShowExamAnnouncement (long ExaCod,Exa_tTypeViewExamAnnouncement_
 	              "<td class=\"%s RIGHT_TOP\">"
 	              "%s:"
 	              "</td>" \
-                      "<td class=\"%s\""
-                      " style=\"text-align:left; vertical-align:top;\">",
+                      "<td class=\"%s LEFT_TOP\">",
             StyleForm,Txt_EXAM_ANNOUNCEMENT_Other_information,
             StyleNormal);
    if (TypeViewExamAnnouncement == Exa_FORM_VIEW)