If you plan to share your screen and present to students during your lesson, follow these steps:
Click the Screen Sharing icon.
Choose what to share:
A Chrome tab — select the specific tab you want to share. Only the selected tab will be visible to students, while your other activities remain private.
A specific window — select the window you want to present. Students will see only the selected window; other activities remain hidden.
Your entire screen — select your screen from the Whole Screen section. To include system sound, enable the Share system sound option. Click Share to start presenting.