Google Hangout, sticky presenter view

Google Hangout will automatically switch the main presenter display to show whomever is talking, which is great for following a conversation, but really inconvenient when you are listening to two people discussing a piece of code. You want the display to stay with the code, to override the auto-switching and stick to the person who is screen-sharing.

Note the thumbnails along the bottom of the Hangout, showing each participant. Click the one you want to stick with, and their video feed will stay in the foreground.