Dancer Blunder

[Rongway]

Any time an action says

※ This action cannot be assigned to a hotbar.

what it means is

※ Under specific circumstances, this action replaces some other action that has already been placed on your bar.

And, not relevant to DNC but still confuses new people, so good to know: if you put an action on your bar but it immediately disappears and is replaced with something else, that means

This action is a permanent upgrade to a lower level action. If you sync below the level that you learn this action, it will automatically revert to the lower level action so that you don't have to take up extra space on your bar for two or more actions that do the same thing. Only the highest available version of this action will be on your hotbar.