toolbar from lg notepad

Hi, I normally use teamviewer 12 from windows to windows machines.  After signin there is the toolbar at the top and small side toolbar that I usually minimize...but there is a small tab that allows toolbar access.  Ocassionally, I use a 10.1 lg android based device with teamviewer 12.  Teamviewer works fine, however, the upper toolbar is not visible nor can i figure out how to access.  Is there a hotkey shortcut or some adroid gesture that I am missing here so that I can access the toolbar?