MS Power Point
How do you add degrees of transparency to shapes such as arrows, so that the slide background shows though?

All of above
Use the Set Transparent Color button on the Picture toolbar
Use the Transparency slider in the Format AutoShapes dialog box
Use #D style 4 button on the drawing toolbar

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MS Power Point
How to create additional Guide Lines?

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

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MS Power Point
Using a custom animation effect, how do you make text appear on a slide by letter

Apply an entrance effect, and then set it to by letter in the effect option dialog box
Apply the fly in entrance to the text, and then set its speed to very slow
Apply the animation scheme fade in one by one
All of the listed here

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