Hey,
 
Let me preface this by saying I'm mostly a drums, bass and guitar guy.  I don't use synths hardly at all.  Nevertheless, I'm working on a song and have found a patch in Dimension Pro that I want to use called "Sun Is Far."  The problem is, the decay is way too long on the patch.  I cannot figure out how to shorten the decay of this patch so that it doesn't fade out so long.  I have managed to shorten the attack.  I did this by adjusting the plot in the Modulators>Amp section.  Can anyone tell me how I can shorten the decay on this patch?  Thanks so much!

If you're able to shorten the Attack, you probably just missed the Release. Just grab the node at the end (and bottom) of the amp envelope and drag it to the left. The photo above is outdated, but the "A" modifier is the Amp Envelope.