Chi-K It relates to the Layout settings, you can try these steps to setup the subpage layout.
1/ Go to Layout settings in template >> clone the current layout to have a new layout - for example: sublayout-nosidebar
![](https://www.joomlart.com/forums/assets/files/2024-01-15/1705298537-509914-screenshot-2024-01-15-at-114815-am.png)
2/ Select this layout to edit it temporarily and remove the sidebar in the mainbody section:
![](https://www.joomlart.com/forums/assets/files/2024-01-15/1705298566-364244-screenshot-2024-01-15-at-114950-am.png)
Save this change for this layout >> then switch to use 'default-sidebar' layout for the current template style
3/ Go to `Subpage Layout' section and assign the new created layout for it. The article page will inherit this layout without the sidebar.
![](https://www.joomlart.com/forums/assets/files/2024-01-15/1705298659-491654-screenshot-2024-01-15-at-115059-am.png)
I hope this makes senses.