Make Teamviewer remember position, scaling, full screen

You can add the remote PC to the Computers&Contacts list and set it to fullscreen on connect in the properties (advanced). You can also change the scaling or resolution that way.

I am using Teamviewer 11.0.53254. I had the same problem. I tried Maurice Gilden's answer and I still couldn't get it full screen.

I then set the remote computer's screen to maximum resolution and changed my monitor to the same resolution and then I got full screen.