adjusting timing

[not you]

ok I was told that i can adjust the timing a little bit on 87 and 93 tunes . My question is when i go in to timing section it reads 000 now when i adjust it Im thinking i have to hit done and thats when it programs the pcm . Now after its done i go back to timing it reads 000 again is the timing set to what i set it at (1.0 ) or is it not working or is it working and there is no record of the new setting (1.0) on the programmer or do i just keep track of it (writing it down) or am I just doing it wrong. Also how do i set it back to the setting that came with the 93 tune . ok I think thats a start point thanks for the help Shawn