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Change the Child Page Sort Order from the default "Title Ascending" to "Custom" one of the other options and then click "Save Page" as shown below.
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If you chose "Custom" as your sorting option then continue this tutorial to arrange the child pages.
Arranging Child Pages with Custom Sorting
Next expand the child pages within the page list so you can see them all by click in the blue tree icon as shown below.
As this point we can drag the "Discontinued" page below the RTG page as shown below.
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