MS Power Point
You were giving your presentation, and you need to click a slide that's few slides back. How do you get there?

All of the listed here
Press backspace until your desired slide
Right click, point to go on the shortcut menu, point to by title, and click the slide you want to go to
Press ESC to get back into a normal view; click the slide thumbnail in normal view; then click the resume slide show button

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MS Power Point
How to create additional Guide Lines?

by holding Ctrl key, click on existing Guide Line and drag
Additional Guide Lines cannot be created
by holding Alt key, click on existing Guide Line and drag
by holding Ctrl + Alt key, click on existing Guide Line and drag

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