Zoom zooms into my video

Hi everybody, 

unfortunately Zoom zooms into my own video and displays my head to big and crops my background. 
There seem to be no option to disable this feature. Does anyone know better and can tell me where to switch this unwanted feature off?

I use the zoom pwa in the chrome browser.

 @51: Make this possible! I am the master of my own face. 

Thanks a lot
Frank