To configure in-meeting settings, tap More at bottom right while you’re in a meeting, and then select Settings.
You can configure the following under Interface preferences:
Hide meeting controls: Tap this to select a time duration to automatically hide meeting controls while in a meeting. Note: You can hide meeting controls by simply tapping on the meeting screen at any time.
Closed captions size: Tap this to select your preferred closed caption size (iOS only).
After configuring the in-meeting settings, tap the left pointing arrow at the top left to go back to the meeting screen.