Merry Christmas to you as well. If what you are asking about is how to recall Programs using MIDI, then the Programs on the Playlist can be recalled by sending Program Changes according to the number of the Program you want to recall.
PC1 = Program 1
PC2 = Program 2
PC3 = Program 3
If what you are asking for is a list of assignable CC numbers, you can find that in the Systems settings under the MIDI category. Under “MIDI – Global Ctl” it’s possible to assign CC#s to various functions that control the H90.
If you wish to assign CC# to a specific parameter of a Program, this can be done by pressing the Parameters button. 6.4.1 of the user manual explains how to map CC#s across the entire Program.