You can use a different layout for a specific page in Jupiter X via Post Options section in the page editor.
Note: Post Options section will appear on the page backend only after you install the plugin Advanced Custom Fields PRO. It’s bundled with Jupiter X and can be installed via Jupiter X > Plugins as described in this article.
Note: Before using a different layout, make sure your page template is set to Default Template in Page Attributes drop down section. If you have Full Width template enabled, the sidebar won’t be visible.
To use a different layout for a specific page
1. From the WordPress left menu, go to Pages and open the page you want to change the layout.
2. Make sure your page template is set to Default Template in Page Attributes.
3. In Post Options section, open the Main tab and set your desired Layout.
If you selected a layout with sidebar(s) , set sidebar areas in Sidebar Primary (and Sidebar Secondary) settings.
4. Save the changes clicking on the Update button on the right side in the page editor.