Disable editing of portlets on portal pages
You will recognize portal pages by the left arrow on the right side of the window.
If you have the appropriate rights, as a portal user you can add or remove portlets by clicking the arrow on the page. See the section Portlets.
The "portlet arrow" is not accessible with the keyboard. Configuration of the portlets is also currently not accessible. Therefore, to make it accessible, the "portlet arrow" should not be displayed and portlet configuration should not be available. You can enable these settings by disabling the portal right "Set portal pages in browser". For more information, see the Portal access permissions section.