Just as further clarification, this mod actually allows individual swapping of items, and not the whole bar at once :stuck_out_tongue:

So for example if we take this picture:

Pressing the default keybind of Shift+3 will swap out ONLY the daggers in slot 3 to the Truncheon displayed above it and place the dagger above as the small icon instead.

Then you can just equip your truncheon and the rest of your hotbar will stay exactly the same.