Display Manager Apk can change the parameters of your Android device display. Yes! You can now change both the density and screen resolution without having to rotate your device (requires rooting on Android 4.3 and above). You can increase the resolution to match the Android market. The look of the tablet on your mobile phone, increased resolution to get more space on the screen and increase screen sharpness in doing so. Reducing it to gain performance in the game, which saves battery power and boosts gaming.