Labeling a shulker box puts an item icon on its outside, so you can tell what is stored in it without opening it. You need an anvil, the shulker box, the item you want as the icon, and at least one experience level.
Applying the Label
1. Place an anvil on the ground and right-click it to open its menu.
2. Put your shulker box into the first slot on the left.
3. Put the item you want as the icon into the second slot. Choose something that clearly matches the contents. For example, use a redstone item for a box of redstone parts or a food item for a box of food.
4. Check that the result shows up in the output slot. Labeling costs one experience level.
5. Take the labeled box from the output slot to pay the cost and collect it.
Checking That It Worked
- Look at the box in your hotbar or inventory. The item icon should now appear on it.
- Place the box down. The icon is also shown on placed shulker boxes in the world.
- Open the box. The assigned icon appears next to the box's title at the top of the container menu.
Tips
- Any item can be a label, so choose icons that are easy to tell apart at a glance.
- If the label item is rare or valuable, keep a spare before you start, in case the anvil uses it up.
- Keep a stack of experience handy if you are labeling a whole set of boxes at once.