I know how to do this via XML, but with Skuid being a declarative UX platform this really really should be provided by Buttons to a Wizard.
As per the following posts:
Navigation Master Page - Trying to convert a prior page into a child page
Changing the Master Page on a Skuid page
Make Child Page Regular Page
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In case you haven’t seen it, there’s a child-normal page converter tool in Skuid Labs.
https://github.com/skuid/skuid-labs/tree/master/experiments/pages/childNormalPageConverter
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