Before you start
You need: a Shopify store, one product you want to personalize, and a reference image for the mockup. That is literally it.
Step 1 — Install
Open the Shopify App Store, search for Customei, click install. Approve the scopes. You are now looking at the template picker.
Step 2 — Pick a template
Choose "blank" unless you want to start from one of the four generator templates (star map, string art, crossword, map). Every template inherits the same field types — the difference is the initial layout.
Step 3 — Drop fields
Drag a text field onto the canvas. Set a max length. Pick a font. Drop an image field if you want customer uploads. Preview on the device switcher to sanity-check mobile.
Step 4 — Publish
Click publish. The template block auto-injects into your product page. Refresh the storefront — the canvas is live.
Step 5 — Ship
When the first order hits, the print-ready file is already in your fulfilment queue. S3, API, or Dropbox — pick the delivery channel once, forget it forever.
Struggling with step 2? Write to hello@customei.app. A real human answers within the hour.