US Patent 10291729 User interface modification and usage tracking

A method is provided to modify a view used by an application to generate a user interface element on a display screen of an electronic device; a view selector information structure identifies a hierarchy of selector visual property constraints and associated selector structural property constraints; modification information indicates one or more modifications to one or more views selected using the view selector; in the course of running the application on the electronic device, a determination is made as to whether an application subview hierarchy matches the selector information structure; in response to determining a match, a modification indicated by the modification information is imparted to one or more views of the matching application subview hierarchy.