The app modes
OpenSongApp has three different modes. You can change the app mode by opening the 'Choose app mode' option from the settings menu. If you are running Android Nougat or later, you can long press on the launcher icon in Android and open the app in the desired mode. When you close the app, it will save the last used mode and restarting will return you to this mode.
Click on the links below to find out more.