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To get a sidebar you've created to appear on a specific page, go to edit the page. On the right side there will be a box titled 'Page Settings', under which you can choose to display one of your sidebars. There is also a checkbox to apply this same
Edit the page
Under Page Settings, select the sidebar.
Check the box to apply the sidebar to all child pages. If you want to apply the same sidebar to an entire section of a site, this option will be useful.
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