File name in Writer for Android

Cannot edit file name in Writer for android. Need instructions to edit file name in Writer for android.

Has anyone noticed that certain softwares and sites use a disclaimer to the effect that the co. distributing the software and owner of the site have the right to retain user data and can change user written info without notice or permissions. I am finding this trend becoming more evident and when attempting to edit contact info that is incomplete and incorrect the info is in need of constant revision as this is establishing a dangerous trend.