diff --git a/modules/backend/formwidgets/markdowneditor/assets/css/markdowneditor.css b/modules/backend/formwidgets/markdowneditor/assets/css/markdowneditor.css
index 958c5a2ba..768f234e7 100644
--- a/modules/backend/formwidgets/markdowneditor/assets/css/markdowneditor.css
+++ b/modules/backend/formwidgets/markdowneditor/assets/css/markdowneditor.css
@@ -106,13 +106,16 @@
   float: none;
   height: auto;
   position: absolute;
+  left: 0;
   right: 0;
   top: 0;
   bottom: 0;
   margin-top: 40px;
 }
-.field-markdowneditor.stretch .editor-write {
-  left: 0;
+.field-markdowneditor.stretch.mode-split .editor-preview {
+  left: auto;
+}
+.field-markdowneditor.stretch.mode-split .editor-write {
   right: auto;
 }
 .field-markdowneditor.is-fullscreen {
diff --git a/modules/backend/formwidgets/markdowneditor/assets/less/markdowneditor.less b/modules/backend/formwidgets/markdowneditor/assets/less/markdowneditor.less
index 8e7376d82..b7d962c3f 100644
--- a/modules/backend/formwidgets/markdowneditor/assets/less/markdowneditor.less
+++ b/modules/backend/formwidgets/markdowneditor/assets/less/markdowneditor.less
@@ -128,15 +128,20 @@
             float: none;
             height: auto;
             position: absolute;
+            left: 0;
             right: 0;
             top: 0;
             bottom: 0;
             margin-top: 40px;
         }
 
-        .editor-write {
-            left: 0;
-            right: auto;
+        &.mode-split {
+            .editor-preview {
+                left: auto;
+            }
+            .editor-write {
+                right: auto;
+            }
         }
     }