diff --git a/app/assets/javascripts/theater.js b/app/assets/javascripts/theater.js
index 62b0bcc..b045f9f 100644
--- a/app/assets/javascripts/theater.js
+++ b/app/assets/javascripts/theater.js
@@ -106,7 +106,7 @@ window.GalleryTheater = function(){
     gt.closeBtn.off('click').on("click",gt.destroyTheater);
 
     // handler to show theater
-    $("div[data-list=images] a").off('click').on("click",function(){
+    $("div[data-list=images] a").filter(":not(.preview)").off('click').on("click",function(){
       gt.createTheater($(this).attr("href"));
       return false;
     })
diff --git a/app/views/galleries/show.html.erb b/app/views/galleries/show.html.erb
index 9e22909..bd3ff5a 100644
--- a/app/views/galleries/show.html.erb
+++ b/app/views/galleries/show.html.erb
@@ -57,7 +57,7 @@
               <a href="<%= image['link_to_show'] %>" class="btn btn-secondary view" onclick="window.location.hash = '<%= image['link_to_show'] %>';GalleryTheater();return false;">
                 <i class="fa fa-link" aria-hidden="true"></i>
               </a>
-              <a href="<%= image['src'] %>" data-toggle="lightbox" data-gallery="gallery" class="btn btn-secondary preview" data-title="<%= image['alt_title'] %>" data-type="image">
+              <a href="<%= image['src'] %>" data-toggle="lightbox" data-gallery="gallery" class="btn btn-secondary preview" data-title="<%= image['alt_title'] %>" data-type="image" target="_blank">
                 <i class="fa fa-eye" aria-hidden="true"></i>
               </a>
             </div>
diff --git a/modules/gallery/_gallery_widget4.html.erb b/modules/gallery/_gallery_widget4.html.erb
index 67da31d..2b56d73 100644
--- a/modules/gallery/_gallery_widget4.html.erb
+++ b/modules/gallery/_gallery_widget4.html.erb
@@ -27,7 +27,7 @@
             <a href="{{link_to_show}}" class="btn btn-secondary view ">
               <i class="fa fa-link" aria-hidden="true"></i>
             </a>
-            <a href="{{src}}" data-toggle="lightbox" data-gallery="gallery" class="btn btn-secondary preview" data-title="{{alt_title}}" data-type="image">
+            <a href="{{src}}" data-toggle="lightbox" data-gallery="gallery" class="btn btn-secondary preview" data-title="{{alt_title}}" data-type="image" target="_blank">
               <i class="fa fa-eye" aria-hidden="true"></i>
             </a>
           </div>
diff --git a/modules/gallery/info.json b/modules/gallery/info.json
index fbf4ac8..528b368 100644
--- a/modules/gallery/info.json
+++ b/modules/gallery/info.json
@@ -68,6 +68,7 @@
         },
         {
             "filename" : "gallery_widget4",
+			"force_cover": "true",
             "name" : {
                 "zh_tw" : "4. 卡片",
                 "en" : "4. Card"