ProPresenter 6 has several different display patterns built into the program to make it easier for you to adjust projectors. These can be found by clicking on the View menu, clicking on Test Patterns, and selecting the pattern you want to use from the left hand menu.
A few of these options are shown below.
Blend Grid makes it easy to configure overlapping projector images.
Focus provides easy reference for focusing and adjusting key stone.
Color Bars is useful for calibrating the color of your projectors.