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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MS Power Point
What is the use of 'Hide Slide' option?

to hide the selected slides during Editing
to hide the selected slides during Printing
to hide the selected slides during Presentation
to hide the selected slides during Deleting

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MS Power Point
What is the use of Researching Timings?

This option allows you to set the time of animations
This option allows you to rearrange slides
There is no such option in PowerPoint
This option allows you to rehearsal of slide presentation

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