diff --git a/public/js/app/page.js b/public/js/app/page.js
index 429b34d1..459b0921 100644
--- a/public/js/app/page.js
+++ b/public/js/app/page.js
@@ -139,12 +139,12 @@ var Resize = {
 				// 禁止split
 				$t.removeClass('open');//.addClass('close');
 				self.rightColumn.find('.layout-resizer').removeClass('open');
-				$('.preview-container').hide();
+				// $('.preview-container').hide();
 			} else {
 				$t.addClass('open');
 				self.rightColumn.find('.layout-resizer').addClass('open');
 				self.leftColumn.width(everLeftWidth);
-				$('.preview-container').show();
+				// $('.preview-container').show();
 				self.rightColumn.css('left', everLeftWidth).width('auto');
 
 				if(MD) {
diff --git a/public/themes/basic.less b/public/themes/basic.less
index 7913873d..32128040 100644
--- a/public/themes/basic.less
+++ b/public/themes/basic.less
@@ -1991,9 +1991,13 @@ img::selection {
 	}
 	#right-column {
 		left: 0 !important;
+        right: 0;
+        width: auto !important;
 	}
+
 	.preview-container {
 		left: 10px;
+        display: block !important;
 	}
 }
 
diff --git a/public/themes/default.css b/public/themes/default.css
index d8bac923..792c2e8e 100644
--- a/public/themes/default.css
+++ b/public/themes/default.css
@@ -1943,9 +1943,12 @@ img::selection {
 }
 #mdEditor.read-only #right-column {
   left: 0 !important;
+  right: 0;
+  width: auto !important;
 }
 #mdEditor.read-only .preview-container {
   left: 10px;
+  display: block !important;
 }
 #notify {
   position: fixed;