MS Power Point
To start slide show of a presentation

From Slide Show menu choose View Show option
From Slide Show menu choose Rehearse timing
Both A & B
Hit F5 key

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MS Power Point
You can add multiple subordinates to a position by

Clicking the subordinate button as many times as the desired boxes
Clicking the subordinate button each and every time you add a subordinate
All of the listed here
Clicking the subordinate button as you press and hold shift

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