We've all been there before: you build up a character and start to wonder if a different Metatype or Metavariant might be a better way to go. Rather than having to rebuild your character, Chummer gives you the flexibility to change your Metatype while still in Create Mode.
Open the Special menu and choose Change Metatype.
You'll be taken back to the Select Metatype window where you can choose a different Metatype and Metavariant. When you're ready, click OK to make the change.
All of the benefits of your previous Metatype/Metavariant will be stripped away and will be replaced by any that the new selection receives.