diff --git a/theme/boxxie/style/core.css b/theme/boxxie/style/core.css
index 2a0420858a2..5b6f4ef2196 100644
--- a/theme/boxxie/style/core.css
+++ b/theme/boxxie/style/core.css
@@ -1057,4 +1057,11 @@ h2.headingblock {
     margin-right: 3px;
     padding: 2px; /* adds padding to icon */
     width: 12px;
+}
+
+.core_media_preview #page-wrapper {
+    min-width: 0;
+    background: none;
+    margin: 0;
+    padding: 0 5px;
 }
\ No newline at end of file
diff --git a/theme/brick/style/pagelayout.css b/theme/brick/style/pagelayout.css
index 349d86962bf..3ce5bce28b1 100644
--- a/theme/brick/style/pagelayout.css
+++ b/theme/brick/style/pagelayout.css
@@ -116,4 +116,21 @@ body {
 }
 
 .pagelayout-report #page-content #region-main {overflow:auto;}
-.pagelayout-report #page-content #region-main .region-content {overflow:visible;}
\ No newline at end of file
+.pagelayout-report #page-content #region-main .region-content {overflow:visible;}
+
+.core_media_preview #page {
+    width: 100%;
+    min-width: 0;
+    margin: 0;
+    padding: 0;
+}
+
+body#page-lib-editor-tinymce-plugins-moodlemedia-preview {
+    width: 422px;
+    padding: 0px;
+    background: none;
+}
+
+.core_media_preview.pagelayout-embedded .mediaplugin {
+    margin: 5px;
+}
\ No newline at end of file
diff --git a/theme/formal_white/style/pagelayout.css b/theme/formal_white/style/pagelayout.css
index 38cf98b6925..8cc7af8fbda 100644
--- a/theme/formal_white/style/pagelayout.css
+++ b/theme/formal_white/style/pagelayout.css
@@ -62,6 +62,18 @@
     background-color:#FFF;
 }
 
+.core_media_preview #page-content #region-post-box {
+    margin-left: 0;
+}
+
+.core_media_preview #page-content #region-main-wrap {
+    width: 100%;
+}
+
+.core_media_preview #page-content #region-main {
+    margin-left: 30px;
+ }
+
 #page-content #region-post-box {
     margin-left:[[calculated:minusdoubleblockcolumnwidth]];
     /* arrotonadamento angolo in basso a dx */
diff --git a/theme/splash/style/pagelayout.css b/theme/splash/style/pagelayout.css
index ff40e4c5d44..8557ba18fe9 100644
--- a/theme/splash/style/pagelayout.css
+++ b/theme/splash/style/pagelayout.css
@@ -779,3 +779,14 @@ table.quizreviewsummary {
     left:0;
     padding-top:10px;
 }
+
+body#page-lib-editor-tinymce-plugins-moodlemedia-preview #page {
+    width: 100%;
+}
+body#page-lib-editor-tinymce-plugins-moodlemedia-preview {
+    min-height: 100%;
+    margin-bottom: 0;
+}
+body#page-lib-editor-tinymce-plugins-moodlemedia-preview .mediaplugin {
+    padding-top: 10px;
+}
\ No newline at end of file