not sure if I am answering correctly but each channel does not have its own fx setting. the same effect you choose for the main reverb/delay are used on every channel. if you pick a plate reverb for channel 1, the same plate reverb will be on the rest of the channels. of course the DL32 has 2 choices on the verb.
what I have done, is once I pick a preset and tweek it to my liking, I save it as a NEW preset and give it a distinctive name so I can pull it up and remember what I liked it for. the new name will help clue you in.