This wikiHow teaches you how to edit your current Auto reply message, or delete it and replace it with a new one, in the Android Auto app. To do this, open the Android Auto app on your phone or tablet, then tap the three horizontal lines icon. Next, tap Settings and Auto reply on the Settings menu. This will open a new pop-up window where you can edit your current Auto reply message. You can modify your current message or delete it and write a new one. Once you have edited your message, tap OK to save your changes.