You can define 5 custom key mappings (bindings). To do this:

In Digital Performer, go to Setup>Commands. You will see a column labeled MAC KEY 2.

On the row of the command you want to map - Click on the MAC KEY 2 column
The commands are mapped by simultaneously holding down Shift, Control, Command, and Option keys and typing in a letter


The following letters are mapped to these buttons on the FaderPort:
u = User
r = Trns
z = Shifted Mix
j = Shifted Proj
x = Shifted Trns – x


These letters were chosen because they do not clash with any existing DP command key bindings