If you want to change the location of a page after creating it, in view mode, click on the three dots in the page menu and click “Move.”
You’ll see the “Move Page” dialog.
Click “Reorder” and then “Move” if you want to move the page to a different location within its current hierarchy. Or click “Move” without reordering if you want to move the page and its children to another location. Enter the new space and new parent page then click ‘Move’.
This page, along with all its attachments, comments, and child pages, will be moved to their new location. Confluence automatically updates all links that point to the moved page.
You can watch our Video #67 of the Video Tutorial Series “Learn Atlassian Confluence” and check this page of Atlassian’s documentation for more info.