6. Knockout Tool (a.k.a Set Transparent Color)
The knockout tool is one of my personal favorites. When wanting
an image to blend into the background or the superimposing of two
images this tool will come in very handy.
The knockout tool
is located on the "Picture" toolbar (Tip
1 will explain how to locate this bar). To use this tool, select
the image; then select the tool; finally click on the color of choice
that you wish to remove from an image.
Points to Remember:
The Knockout tool will only remove 1 color per image. You may
find that it does not work well if the images original background
is a sharp contrast to your PowerPoint background. Lastly, it may
remove more of the image than you wish. It doesn't hurt to try and
with experience you will quickly learn when to use it and when not