In Shopify, you can preview and test themes that are not your current live theme. If you want to test Promolayer while previewing a non-live theme, follow the steps below to enable it.
1. Click 'Customize' on the theme you want to test
2. Open the 'Apps' tab
3. If the Promolayer toggle is already on, leave it as is. If it is off, turn it on and click 'Save' in the top right.
