There are 15 rear-view mirror variations, all of which are fully customizable. The mirror used in the series example has not been adjusted in any way, so you can see that they can also be used as is. This is a great way to illustrate comparisons and contrasts of past and present/future, a focus direction, lessons learned, etc.
There is only one download, which contains all 15 variations.
You'll notice that some of the mirrors are in a straight-on position. Others are slightly slanted. The slants are slight, so they won't be noticeable if you import a photo into the mirror section of the rear-view mirror.
Customizing the rear-view mirrors
Group the mirrors and then resize as a group. Hold the shift key down to rescale, which is recommended. That way the mirrors won't distort.
You don't need to recolor these, but you certainly can if you want. These are actual objects and not stylized in any way, so be careful about the colors that you choose. Colors that are too bright, etc., will make the mirrors look cartoonish, which may distract from your message.
PowerPoint 2007 options
Don't use any special formatting.
Don't use 3D.
Don't use shadows
Gradients, patterns, and pictures
You can add gradients if you want to any field except the mirror. Gradients will add a little depth and give the appearance of shadows and a light source.
Consider importing pictures into the mirror part of the rear-view mirror. See the series example to see how they should look. Refer to this FAQ for instruction on importing a photograph or image into the mirror field of these frameworks: How do I create photographs in different shapes from rectangular photographs?
None are really needed unless you use simple reveals. Nothing flashy here please.