So here's what I want to do. I want to put (for example) this button to my presentation, and then when I move the cursor on it, some e.g. text balloon to appear. But when the cursor isn't on the button I want the text balloon to be hidden. How I can do that? THANKS IN ADVANCE.

See if this does what you need. You will need to have PowerPoint up to date with service packs.

Download

Tutorial if it works

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Microsoft PowerPoint MVP 2007-2023
Free Advanced PowerPoint Tips and Tutorials

Thank you so much. It was so helpful!