diff --git a/openslides/projector/api.py b/openslides/projector/api.py
index de0cf03b8..6bcc04772 100644
--- a/openslides/projector/api.py
+++ b/openslides/projector/api.py
@@ -86,8 +86,13 @@ def set_active_slide(sid, argument=None):
     """
     config["presentation"] = sid
     config['presentation_argument'] = argument
+    clear_projector_cache()
+
+
+def clear_projector_cache():
     cache.delete('projector_content')
     cache.delete('projector_scrollcontent')
+    cache.delete('projector_data')
 
 
 def register_slidemodel(model, model_name=None, control_template=None,
diff --git a/openslides/projector/projector.py b/openslides/projector/projector.py
index 5ebd81ab3..9247a010b 100644
--- a/openslides/projector/projector.py
+++ b/openslides/projector/projector.py
@@ -58,6 +58,12 @@ class SlideMixin(object):
         """
         set_active_slide(self.sid)
 
+    def save(self, *args, **kwargs):
+        if self.active:
+            from api import clear_projector_cache
+            clear_projector_cache()
+        return super(SlideMixin, self).save(*args, **kwargs)
+
 
 class Slide(object):
     """
diff --git a/openslides/projector/views.py b/openslides/projector/views.py
index 54fa7a866..10c22f1ea 100644
--- a/openslides/projector/views.py
+++ b/openslides/projector/views.py
@@ -122,14 +122,21 @@ class Projector(TemplateView, AjaxMixin):
                 'scrollcontent', self.data)
             cache.set('projector_scrollcontent', scrollcontent)
 
+
+        # TODO: do not call the hole data-methode, if we only need some vars
+        data = cache.get('projector_data')
+        if not data:
+            data = self.data
+            cache.set('projector_data', data)
+
         context = super(Projector, self).get_ajax_context(**kwargs)
         content_hash = hash(content)
         context.update({
             'content': content,
             'scrollcontent': scrollcontent,
             'time': datetime.now().strftime('%H:%M'),
-            'overlays': self.data['overlays'],
-            'title': self.data['title'],
+            'overlays': data['overlays'],
+            'title': data['title'],
             'bigger': config['bigger'],
             'up': config['up'],
             'content_hash': content_hash,