MS Power Point
You can tell when an object is active because

A box frame appears surrounding the text
The object is highlighted
Eight small sizing handles appear surrounding the text
b and c

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

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