Permission to customize site pages can be granted to users via the "page customization" feature.
Resolution
To enable "Page Customization" on a desired page:
- In the control panel, navigate to the Site Pages.
- Within the Site Pages, select the page which you would like to enable "Page Customization" for.
- Select the Permissions and check the box for "Customize" for the role(s) you would like to be able to customize the page.