What exactly it means by "Additional Screen" here? Are you referring to multiple tabs within the application or is it the page view you are referring to?
Are you trying to access the "Edit" menu under the Adobe Reader DC tools? If yes, then this feature isn't available with the Adobe Reader DC application. It will only work with the Adobe Acrobat DC subscription.
Sorry to say ,the information shared above is not quite clear to understand the exact issue you are struggling with. If you are still looking for the resolution then you may share detailed information.