Android app: decline to view screen share

Hi. Using the Android app on my tablet, I go to a class where the teacher screen shares a PDF of a textbook. But I have the paper textbook so don’t need to see the screen share and I’d rather stick with gallery view and see my classmates. On the PC I can just make the screen share tiny. Is there any way I can do something similar - or decline to see the screen share - on an Android tablet?