If you have created and embedded a Custom Design Form in your customiser, you can set it as the initial screen, replacing the default sign visualiser.
How to Enable in Shopify
Log in to your Shopify Admin.
In the left-side menu, go to Sales Channels → Online Store.
Click Customize on your active theme.
Select the product or page template that includes your customiser from the dropdown at the top.
Click on the Sign Customiser app block.
In the Initial Screen dropdown, select Custom Design.
How to Enable in the Universal App
For Universal subscribers, set the Custom Design Form as the initial screen by updating your iframe code. Add the initial_screen=CUSTOM_DESIGN query parameter to your URL.
Note: Replace "YOUR_CUSTOMISER_ID" with your actual customiser ID.
Example:
Before:
<iframe src="<https://web.signcustomiser.com/embed/YOUR_CUSTOMISER_ID>"></iframe>
After:
<iframe src="<https://web.signcustomiser.com/embed/YOUR_CUSTOMISER_ID?initial_screen=CUSTOM_DESIGN>"></iframe>