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.
This hotbar is pulled from Gingergaming's channel and is used for myself with some modifications to remove macro usage.
Main tank. Adapted for XIVcombo.
/micon Shirk /merror off /ac Shirk<t> /ac Iron Will
No new buttons.
First version of Azeron layout. Hotbar 3 is center row of buttons, 1 & 2 are upper flick buttons, 4 & 5 are squeeze buttons. Actions on the upper halves of hotbars are shift (nub click) + 1-4 (pinky-pointer). Hotbar 4 sides are shift and outer buttons.