I very much appreciate your help....however, there must be someone out there who knows a little more about this, or knows some of the tricks....I'm just trying to make the most distant objects in a picture blurry, while retaining the clarity of the other objects.  I tried choosing all objects save the ones I wanted blurry, then using the "set to current selection", but then everything became blurry.  Also, it seems once you change the numbers they stay that way....is there a way to reset them.  I'm having a bit of trouble explaining myself about this subject, but any information is helpful.