When participating in live sessions using Virtual Classroom you get to use a number of tools, viewing the lecturer's webcam, seeing their slides or screen, using chat to name a few.
You might like to make the presentation larger when the lecturer is presenting, this is possible to do, you can make the presentation fullscreen, allowing you to get a clearer view of what is being presented. Using the guide below you can follow the instructions to make the presentation or shared screen, fullscreen: