diff --git a/openslides/assignments/static/templates/assignments/assignment-detail.html b/openslides/assignments/static/templates/assignments/assignment-detail.html
index 3007efaf1..ac3b15606 100644
--- a/openslides/assignments/static/templates/assignments/assignment-detail.html
+++ b/openslides/assignments/static/templates/assignments/assignment-detail.html
@@ -127,7 +127,8 @@
   </button>
 
   <uib-tabset class="spacer">
-    <uib-tab ng-repeat="poll in assignment.polls | orderBy:'-id'" heading="Ballot {{ assignment.polls.length - $index }}">
+    <uib-tab ng-repeat="poll in assignment.polls | orderBy:'-id'"
+        heading="{{ 'Ballot' | translate }} {{ assignment.polls.length - $index }}">
       <div os-perms="assignments.can_manage" class="spacer">
         <!-- angular requires to open the link in new tab with "target='_blank'".
         Otherwise the pdf url can't be open in same window; angular redirects to "/". -->
@@ -143,17 +144,17 @@
           2. <translate>Enter votes</translate>
         </button>
         <i class="fa fa-arrow-right"></i>
-        <button os-perms-lite="assignments.can_manage" ng-if="!poll.published" ng-click="publishBallot(poll, true)"
+        <button ng-if="!poll.published" ng-click="publishBallot(poll, true)"
             class="btn btn-default btn-sm">
           <i class="fa fa-toggle-off"></i>
           3. <translate>Publish ballot</translate>
         </button>
-        <button os-perms-lite="assignments.can_manage" ng-if="poll.published" ng-click="publishBallot(poll, false)"
+        <button ng-if="poll.published" ng-click="publishBallot(poll, false)"
             class="btn btn-default btn-sm">
           <i class="fa fa-toggle-on"></i>
           <translate>Published</translate>
         </button>
-        <a ng-click="deleteBallot(poll)" class="btn btn-default btn-sm">
+        <a ng-click="deleteBallot(poll)" class="btn btn-danger btn-sm">
           <i class="fa fa-times"></i>
           <translate>Delete</translate>
         </a>
diff --git a/openslides/core/static/templates/core/projector-controls.html b/openslides/core/static/templates/core/projector-controls.html
index aa621b79f..6bb7db1fd 100644
--- a/openslides/core/static/templates/core/projector-controls.html
+++ b/openslides/core/static/templates/core/projector-controls.html
@@ -3,7 +3,7 @@
 
   <div ng-controller="ProjectorControlCtrl">
     <!-- live view -->
-    <div class="section" os-perms-lite="core.can_see_projector">
+    <div class="section" os-perms="core.can_see_projector">
       <a href="#" ng-click="isLiveViewClosed = !isLiveViewClosed">
         <i class="fa toggle-icon" ng-class="isLiveViewClosed ? 'fa-angle-up' : 'fa-angle-down'"></i>
         <h4 translate>Live view</h4>
diff --git a/openslides/mediafiles/static/templates/mediafiles/mediafile-list.html b/openslides/mediafiles/static/templates/mediafiles/mediafile-list.html
index ecbf142e3..18084ade6 100644
--- a/openslides/mediafiles/static/templates/mediafiles/mediafile-list.html
+++ b/openslides/mediafiles/static/templates/mediafiles/mediafile-list.html
@@ -60,7 +60,7 @@
         <td>{{ mediafile.uploader.get_full_name() }}
         <td os-perms="mediafiles.can_manage core.can_manage_projector" class="nobr">
           <!-- projector, TODO: add link to activate slide -->
-          <a href="#TODO" ng-if="mediafile.is_presentable" os-perms-lite="core.can_manage_projector"
+          <a href="" ng-show="mediafile.mediafile.type == 'application/pdf'" os-perms="core.can_manage_projector"
               class="btn btn-default btn-sm"
               title="{{ 'Show' | translate }}">
             <i class="fa fa-video-camera"></i>
diff --git a/openslides/users/static/js/users/site.js b/openslides/users/static/js/users/site.js
index ed9cf0caa..26de52774 100644
--- a/openslides/users/static/js/users/site.js
+++ b/openslides/users/static/js/users/site.js
@@ -231,47 +231,6 @@ angular.module('OpenSlidesApp.users.site', ['OpenSlidesApp.users'])
     }
 ])
 
-/*
- * Like osPerms but does only hide the DOM-Elements
- *
- * This is the Code from angular.js ngShow.
-*/
-.directive('osPermsLite', [
-    '$animate',
-    function($animate) {
-        var NG_HIDE_CLASS = 'os-perms-lite';
-        var NG_HIDE_IN_PROGRESS_CLASS = 'os-perms-lite-animate';
-        return {
-            restrict: 'A',
-            multiElement: true,
-            link: function(scope, element, $attr) {
-                var perms;
-                if ($attr.osPermsLite[0] === '!') {
-                    perms = _.trimLeft($attr.osPermsLite, '!');
-                } else {
-                    perms = $attr.osPermsLite;
-                }
-                scope.$watch(
-                    function (scope) {
-                        return scope.operator.hasPerms(perms);
-                    }, function ngShowWatchAction(value) {
-                        if ($attr.osPermsLite[0] === '!') {
-                            value = !value;
-                        }
-                        // we're adding a temporary, animation-specific class for ng-hide since this way
-                        // we can control when the element is actually displayed on screen without having
-                        // to have a global/greedy CSS selector that breaks when other animations are run.
-                        // Read: https://github.com/angular/angular.js/issues/9103#issuecomment-58335845
-                        $animate[value ? 'removeClass' : 'addClass'](element, NG_HIDE_CLASS, {
-                            tempClasses: NG_HIDE_IN_PROGRESS_CLASS
-                        });
-                    }
-                );
-            }
-        };
-    }
-])
-
 // Service for generic assignment form (create and update)
 .factory('UserForm', [
     '$http',