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.
https://www.youtube.com/watch?v=fjFdwzh6Nck
https://www.youtube.com/watch?v=EhPYNgO9aVQ
https://www.youtube.com/watch?v=tsHYxmS6LQQ
Hotbar 1 (Back)
1: Part 1 Combo
2: Part 2 Combo
3 Rez Bar
4: Utilities
Hotbar 2 (Front)
1: Single Target
2: Upgraded Singles
3: Aoe
4: Buffs
From Bun Boss video
Main caster. XIVcombo.