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.
My starter Pictomancer hotbar for Dawntrail, designed to be played with an MMO mouse.
fits all actions for more comfortable combo rotations and movement while fitting all role actions, LB, and sprint and some free slots on the WXHB for extra stuff (mounts, items, etc)
Attempt to have Twinfang and Twinblood on face buttons for better movement
Analysed before launch how to best place all abilities, tested in Early Access. Tried putting as many attack abilities on the right side of each bar to not have to release movement button as much, while keeping the ogcd attacks close to their correspondin
MMO mouse using 1-= keys set by default for hotbar 1. Ctrl1 thru Ctrl= for hotbar 2. Shift1 thru shift= for hotbar 3. Twinblood, twinfang, and uncoiled fury repeated on bars 1 and 3 to simplify using actions in single target and aoe situations.