Open your inventory
Put the quiver in your hotbar or inventory
Hold the quiver in your hand
Open the quiver UI by right-clicking or using the mod’s assigned keybind
Drag arrows from your inventory into the quiver slots
If the quiver supports auto-fill, keep arrows in your inventory and use the quiver normally
Make sure the arrows are the correct type for the quiver
Check the mod keybinds in Controls if the quiver UI does not open
If the quiver is full, remove some arrows before adding more