The Product Sections template is a legacy feature of the Flex theme. Now it is essentially identical to the Default template, but for older versions of Flex, this template was used for adding sections to product pages. This is now possible for all product templates in Online Store 2.0 theme versions.
Duplicate the Product Sections Template
In the theme editor (Customize), use the page selector to select Products, then [+] Create template. Give the template a name then select the Product Sections template for the Based on setting. Click Create template to complete the duplication.
Vintage Flex Versions
Versions of Flex released before 3.0.0 are considered vintage themes, so duplicating the Product Sections template involves editing theme files.
Note: If you're looking to create a high number (10+) of custom pages with unique features/content-blocks on each, we advise seeking a customized solution from one of our recommended Shopify Experts, with whom you can discuss your custom page requirements and consider the use of Shopify's Metafield implementation for this level of unique customization. An excessive number of additional custom product.sections templates will result in difficulties using the Customize settings editor.
Step 1: Head into Online Store > Themes > Actions > Edit Code.
Step 2: Under Templates click Add a new template.
Step 3: Make this new template of the 'product' variety, call it 'sections-2' and then click 'Create template'.
Important: You must start the name you enter here with the word "sections" in order for all features to work. For example, entering "sections-2" (which becomes "product.sections-2.liquid") or "sections-new-product" (which becomes "product.sections-new-product.liquid") will work, but "new-product" (which becomes "product.new-product.liquid") will not.
Edit the template code
Step 4: Remove all the code that is in the file you just created and replace it with the code from the original product-sections.liquid template file.
Step 5: Near the bottom of the product.sections-2.liquid file, you'll see this code:
{% section 'product-sections__main' %}
Step 6: You'll just need to update it to be:
{% section 'product-sections__main-2' %}
Step 7a (optional): If you would like to have a unique sidebar, you'll also need to replace this code:
{% section 'product__sidebar' %}
Step 7b (optional): With this code:
{% section 'product__sidebar-2' %}
Step 8: Save your template.
Edit the section code
Step 9: Under Section click Add a new section.
Step 10: Call this new section 'product-sections__main-2' and click 'Create section'
Step 11: Remove all the code that is in the file you just created and replace it with the code from the original product-sections__main.liquid section file.
Step 12: Save your section.
Step 13 (if you followed the optional steps 7a + 7b): For the sidebar, under Section click Add a new section.
Step 14 (if you followed the optional steps 7a + 7b): Call this new section 'product__sidebar-2' and click 'Create section'.
Step 15 (if you followed the optional steps 7a + 7b): Remove all the code that is in the file you just created and replace it with the code from the original product__sidebar.liquid section file.
Step 16 (if you followed the optional steps 7a + 7b): Save your section.
Assigning the duplicate template to your product
Step 17: Once you've duplicated the files, you'll need to assign the new template to your product. In the Shopify Admin > Head into Products and locate your product. Under Theme Templates, select 'product.sections-2' and save.
This process can be repeated if you need by creating more templates and sections and following the naming conventions as the above instruction, such as:
Template: product.sections-3
Section: product-sections__main-3
Section: product__sidebar-3
...and so on
Advanced Customization
Please note that this tutorial is considered an advanced customization and is not supported by Out of the Sandbox. If you encounter difficulties with this, please contact a third party developer for more troubleshooting, customization or functionality.