Changing Parent of a Page - Confluence User Guides and Documents

To change the parent of an existing page,

Go to the page and click on the 'Edit' tab.
Click 'Edit' beside 'Location'.
The space in which the page is located will appear by default in the 'Space' drop down menu. If you wish to select a parent in another space, you will need to move the page to that space. A child cannot have a parent in a different space
Use the Choose a Page option to locate the parent page. Or else simply type in the name of the parent page.
Click 'Save'.