Minecraft wiki entry for Loom, associated text: Using on a loom opens its GUI. It has 3 slots for a banner, a dye and an optional banner pattern item. When a banner is put in, a list of patterns appears in the center part. 6‌[Java Edition only] or 8 patterns require the following banner patterns: Flower Charge, Creeper Charge, Skull Charge, Thing, Snout, Globe, Field Masoned,‌[Bedrock Edition only] and Bordure Indented.‌[Bedrock Edition only] Putting a banner pattern in its respective slot makes the loom show only that pattern.