A limited set of actions can assigned via macro commands. Incompatible actions are ommited from the generated macro. Also note that Macros are limited to 15 lines each.
First attempt to make panels for MMO mouse with 2 3x4 hotbars and 1 6x2 for utility
Endwalker Lvl90 RDM
RDM as of 6.5
The VerHotbar