To attach a customization to an item,
- Click the Items button on the top bar of the Menu tab.
- Select the item you’d like to attach a customization to.
- On the item screen, begin typing the name of the customization in the Search for customizations box. Instore will generally recognize the customization you desire after a couple characters.
- You can then click on the desired customization and it will show up on the item screen with its own box.
- Customizations can be detached from items by clicking the red x in the customization box.