&screensharewill allow the guest to screen share by being directly asked to share a screen or window instead of being taken to the camera/screenshare selection screen.
--node trueor in the app by right-clicking and selecting "Elevate Privileges" from the context-menu.
&screenshare=1for the main display
&screenshare=2for the second display
&screenshare=discordfor the Discord application
&screenshare=googlechromefor the Chrome Browser