TL;DR
While presenting, click the Minimize button to return to the Board without losing your place. When you reopen the presentation, it starts on the last slide you showed. Do not click Close if you want to keep the presentation where it is.
Overview
If you want to go back to the Board without restarting your presentation, minimize the presentation instead of closing it. When you open it again, you’ll return to the same slide.
Steps
- While presenting the session, click the Minimize button (-).
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Return to the Board.
Do not click the Close button (X) if you want to keep your place in the presentation.
When you continue the presentation, it opens on the last slide you projected.