diff --git a/frontend/resources/styles/main/partials/zoom-widget.scss b/frontend/resources/styles/main/partials/zoom-widget.scss
index b25192321..16abbc1a1 100644
--- a/frontend/resources/styles/main/partials/zoom-widget.scss
+++ b/frontend/resources/styles/main/partials/zoom-widget.scss
@@ -1,6 +1,7 @@
 .zoom-widget {
   cursor: pointer;
   display: flex;
+  position: relative;
 
   span {
     color: $color-gray-10;
@@ -16,8 +17,10 @@
 
   .dropdown {
     position: absolute;
-    z-index: 12;
+    right: 0;
+    top: 25px;
     width: 210px;
+    z-index: 12;
 
     background-color: $color-white;
     border-radius: $br-small;
diff --git a/frontend/src/app/main/data/viewer.cljs b/frontend/src/app/main/data/viewer.cljs
index 0ccf53049..7220cfc2f 100644
--- a/frontend/src/app/main/data/viewer.cljs
+++ b/frontend/src/app/main/data/viewer.cljs
@@ -219,6 +219,12 @@
     (update [_ state]
       (update-in state [:viewer-local :show-thumbnails] not))))
 
+(def close-thumbnails-panel
+  (ptk/reify ::close-thumbnails-panel
+    ptk/UpdateEvent
+    (update [_ state]
+      (assoc-in state [:viewer-local :show-thumbnails] false))))
+
 (def select-prev-frame
   (ptk/reify ::select-prev-frame
     ptk/WatchEvent
diff --git a/frontend/src/app/main/ui/viewer/header.cljs b/frontend/src/app/main/ui/viewer/header.cljs
index b0c869f90..7d37a3a14 100644
--- a/frontend/src/app/main/ui/viewer/header.cljs
+++ b/frontend/src/app/main/ui/viewer/header.cljs
@@ -84,15 +84,23 @@
 
         show-dropdown? (mf/use-state false)
 
+        open-dropdown
+        (fn []
+          (reset! show-dropdown? true)
+          (st/emit! dv/close-thumbnails-panel))
+
+        close-dropdown
+        (fn []
+          (reset! show-dropdown? false))
+
         navigate-to
         (fn [page-id]
           (st/emit! (dv/go-to-page page-id))
-          (reset! show-dropdown? false))
-        ]
+          (reset! show-dropdown? false))]
 
      [:div.sitemap-zone {:alt (tr "viewer.header.sitemap")}
       [:div.breadcrumb
-       {:on-click #(swap! show-dropdown? not)}
+       {:on-click open-dropdown}
        [:span.project-name project-name]
        [:span "/"]
        [:span.file-name file-name]
@@ -101,7 +109,7 @@
        [:span.icon i/arrow-down]
 
        [:& dropdown {:show @show-dropdown?
-                     :on-close #(swap! show-dropdown? not)}
+                     :on-close close-dropdown}
         [:ul.dropdown
          (for [id (get-in file [:data :pages])]
            [:li {:id (str id)