/script PickupInventoryItem(17);if(CursorHasItem()) then PickupContainerItem(4,2);PickupContainerItem(4,1);PickupInventoryItem(16);else PickupContainerItem(4,1);PickupInventoryItem(16);PickupContainerItem(4,2);PickupInventoryItem(17);end
(this should be all o*ne line)
Put your main hand item in left most bag upper left slot, offhand item to the right of it. put your 2h weapon in your inventory. Now this button will swap the two sets back and forth.
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