The AdjustPositionForPixelPerfectDrawing method tells the FlatRedBall Engine to attempt to offset Text objects so that they do not render in-between pixels. This value defaults to true, and in most cases you do not need to adjust it.
AdjustPositionForPixelPerfectDrawing should be turned off if FlatRedBall is not properly adjusting your Text objects to be pixel perfect. One common scenario for this is if a Text object is on a camera other than the default Camera.
The following assumes that "TextInstance" is a valid Text object: