what hotbar slot? I am so confused. The keymapping for hotbars and runearms is completely separate and not compatible.
You can set up a hotbar to fire a rune arm.
Under Main Menu - Options - Key Mapping
- search 'rune'
Press the "Use Rune Arm" button
You get the text "The next key you press or mouse button you click will be mapped to the 'Use Rune Arm' action"
I used it to set my hotbar 3, slot 1 to fire my rune arm, since I could afford to lose use of that slot on my other characters.
(I had to set hotbar 3 as the active hotbar first.)
For my artificer, I have to use CRTL-3 to set hotbar 3 to the active hotbar, which I occasionally forget.
You still can't use that slot for anything on other characters.
It's the best I've come up so far avoid using left-ALT.