Raw definitions can be used to customize even the last bits of your apps beyond the capabilities of the wizard.
The XML Configuration of your app can be found under "Advanced" » "XML Configuration".
To make changes to the XML, switch to edit mode by clicking the pencil icon.
For more information and to view the definitions go to our documentation: openasapp.readme.io
The list of definitions cannot be considered complete. New entries are added on a day-to-day basis.