Sharing only one window or part of a screen in Zoom The following link from a college refers to sharing part of the screen in Zoom  https://www.etsu.edu/helpdesk/documents/zoom-share-portion-of-screen.pdf

However when I click on &quot;Share | Advanced Sharing Options&quot; as follows:

There are no partial screen sharing options available:

So then - how can part of the screen or only one window be shared?
Update  When clicking directly on the green &quot;Share&quot; there are no options at all for customization - not any dialog or any buttons.

There is only this:

Another update OK the issue is that I had sometime in the past set up &quot;Automatically share desktop&quot; in Prefences . I'll make that an answer per @grg
Don’t click the arrow next to the share button — just click the green Share button itself.
‘Advanced’ doesn’t refer to the advanced options dialog, just the tab at the top of the normal window accessed by clicking Share.