diff --git a/addons/website_slides/static/lib/pdfslidesviewer/PDFSlidesViewer.js b/addons/website_slides/static/lib/pdfslidesviewer/PDFSlidesViewer.js
index d5e7266930c..f313a37dfa3 100644
--- a/addons/website_slides/static/lib/pdfslidesviewer/PDFSlidesViewer.js
+++ b/addons/website_slides/static/lib/pdfslidesviewer/PDFSlidesViewer.js
@@ -147,12 +147,22 @@ var PDFSlidesViewer = (function(){
 
     PDFSlidesViewer.prototype.toggleFullScreenFooter = function(){
         if(document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement) {
-            $('div#PDFViewer > div.navbar-fixed-bottom').toggleClass('oe_show_footer');
+            var $navBarFooter = $('div#PDFViewer > div.navbar-fixed-bottom');
+            $navBarFooter.toggleClass('oe_show_footer');
+
+            if ($navBarFooter.css('display') === 'none') {
+                $navBarFooter.css('display', 'block');
+                $('div#PDFViewer').css('padding-bottom', '50px');
+            } else {
+                $navBarFooter.css('display', 'none');
+                $('div#PDFViewer').css('padding-bottom', '0');
+            }
         }
     }
 
     PDFSlidesViewer.prototype.toggleFullScreen = function(){
-        var el = this.canvas.parentNode;
+        // The canvas and the navigation bar needs to be fullscreened
+        var el = this.canvas.parentNode.parentNode;
 
         var isFullscreenAvailable = document.fullscreenEnabled || document.mozFullScreenEnabled || document.webkitFullscreenEnabled || document.msFullscreenEnabled || false;
         if(isFullscreenAvailable){ // Full screen supported