Template Creator requires an advanced knowledge of Liquid - if you're not confident in this, we'd recommend finding a developer to work with on the Shopify Experts Marketplace.
What is Template Creator?
Template Creator allows you to replace the bundle page's default template with your own custom template. This will override the existing template and take full control of the bundle page as a result.
You can find the Template Creator in the Bundle Builder app by heading to Settings → Template Creator.
You need to have a strong understanding of Liquid to create your own bundle template implementation.
Most design settings found within Bundle Builder will not apply to a customized Template Creator template - any settings functionality you require will need to be coded in to the template
Restoring the Default Template
If you've created, or started creating a custom template, you always have the option to switch back to the default template at any time.
You can switch back to the default template by deleting your custom template code, saving the page, and then refreshing your browser. This should restore the default template.
For more information, please read our reference guides: