Click an element on the preview or in the list to edit it, and drag it on the preview to move it. Positions are in millimetres from the label's top-left corner.

Text can mix fixed words with fields: {title} {product} {variant} {price} {currency} {unit} {compare} {sku} {barcode} {vendor} {url}, and any product metafield as {mf:custom.fabric_key_details_content}.