TL;DR
Add a keybind that allows to swap right and left sides of hotbars.What?
Keys from 1 to 5 are easily reachable with left hand without lifting it off the home row as opposed to 6-0 keys.We currently have the ability to cycle active hotbars ('x' by default). I was somewhat surprised to see that 'Shift+x' does not cycle them backwards, but it's a non-issue anyway (as we all know, 'Shift+r' is barely used for rotating entities anyway). A functionality that would be very useful to assign to some modifier key and 'x' though (i.e. 'Shift+x' or 'Alt+x', since 'Ctrl+x' is taken) is to swap the hotbar sides, so that the player can quickly and easily use all 10 slots with keystrokes without lifting their hand from either the mouse or the home row.