just getting started and mending the index page.
stuck on only the second step, were to find the field key?
On this line
const linkField = "link-to-item"; // replace this value
change the value inside double quotes to the correct field key.
Remember, each time you add a dynamic page, a field is automatically created in your collection with relative URLs for that page. In the Data Manager, you need to locate the field with the URLs for the dynamic item page that you want to add previous and next buttons to. To find the Field Key for a collection field, click on the vertical ellipses that appears when you hover over a field in the Data Manager in the Editor and select Manage Properties. Be sure to use the Field Key and not the Field Name.
I only have one automaticaly created product page, do not find the data manager, no vertical ellipse, no field key?