Thanks for the suggestion, torontokris, but the area I'd like to dim most is the backlighting of all the clear buttons on the face. Actually, I just ordered a 996XT and this 785D will going up on eBay pretty soon and HOLY #$*! ... from your signature you have A LOT of scanners and radios!
If you still have plans to keep the 785 for any reason, it shouldn't be too hard to get inside and find where the ground for the backlighting is and put a small resistor in-line to limit the current through the lights.
Thanks for the replys. If I knew exactly what I was doing, I may try to open it up and insert a resistor into the circuit. My assumption is that there are a number of LEDs in there, lighting the keys and display, and all are probably soldiered to a PC board (with a common ground). Again, I'd be up to the mod if someone could help me know exactly where to insert the resistor.
(It's great that today's LEDs can work within a much broader voltage range than the older generations did, allowing them to burn from really dim to really bright.)