diff --git a/src/demo/event_handler_main.py b/src/demo/event_handler_main.py
index ad5e9ce..730cf18 100644
--- a/src/demo/event_handler_main.py
+++ b/src/demo/event_handler_main.py
@@ -25,11 +25,26 @@ def selectdir(history):
     except Exception:
         log.exception('Selectdir failed!')
 
+
+def toggle_next(history):
+    toggle_next.button_state = not toggle_next.button_state
+    try:
+        cmd = history[-1].split()
+        if cmd[0] == 'togglenext':
+            ServerUplinkConnector().send('messagecontrol',
+                                         {'data': {'command': 'showbutton',
+                                                   'next_visibility': toggle_next.button_state}})
+    except Exception:
+        log.exception('Togglenext failed!')
+toggle_next.button_state = False
+
+
 if __name__ == '__main__':
     ide = SourceCodeEventHandler(key='webide', directory=tfwenv.WEBIDE_WD, exclude=['__pycache__'])
     terminado = TerminadoEventHandler(key='shell')
     terminado.historymonitor.subscribe_callback(cenator)
     terminado.historymonitor.subscribe_callback(selectdir)
+    terminado.historymonitor.subscribe_callback(toggle_next)
     processmanager = ProcessManagingEventHandler(key='processmanager', dirmonitor=ide.monitor)
 
     eventhandlers = {ide, terminado, processmanager}