You can equip your character with up to three weapon sets they can freely switch between when not in combat. Drag and drop weapons into corresponding weapon set slots from the party inventory. You can also put them back into the inventory at will.
You can use one handed weapons with a shield or dual wield with another one handed weapon. If you equip ranged weapons, don't forget to put some ammunition into the weapon set slots as well.
Decide which weapon set is used first during battle.