Annotate shared screen

I want the team to mark key spots on the architecture diagram together. Enable annotation for everyone, share my screen showing the file 'System Architecture.png', and clear all annotations after the session. Tell me which three people currently have annotation rights and how to revoke them if needed.

Before the client workshop, make it easy for reviewers to annotate without wrecking the slide. Surface which annotation tools are available, put the pen and spotlight within easy reach, and flag any settings that let participants scribble over client logos so I can lock those if necessary.

During the walkthrough a participant scribbled over the client logo and the client looked annoyed. I don’t know if they did it maliciously or by mistake and I’m afraid of escalating. What’s the likely cause of accidental annotation, how can I immediately remove or hide that mark without embarrassing anyone, and how should I address it after the call?

Across many workshops participants either annotate too much or leave a mess I must tidy. Which default setting or facilitator habit will keep annotations productive, how should I brief participants at the start so they behave, and a short rule I can enforce so follow-ups don’t become fixes?