PropEditor is a simple Java application that lets you modify build.prop file, which is used to specify the device configuration. PropEditor can also add new properties and even new lines in the build.prop file.

To install PropEditor, you need to be running Android 5.0 or higher, and have root access.

Once you have root access, you can open the build.prop file and make changes to it.

The build.prop file is used to specify the device configuration, which includes the system and user properties.

PropEditor lets you add new properties and even new lines to the build.prop file, which you can specify using the new line syntax.