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.
Here is my gunbreaker cross hotbars!
The crystal is a potion item.
My reaper cross hotbars.
My dancer crosshotbars
My white mage crosshotbars. ! macro is "/target <f> tank macro is "/target <2>
https://www.youtube.com/watch?v=tsHYxmS6LQQ
Bars I've run with Since 2017
WiP Based on BunBoss and SGE/WHM hotbar layouts
Endwalker Lvl90 Scholar