2. Touch Attentive Display and turn the feature on or off.
Stop automatic rotation
Prevent screen from rotating
Open quick settings and turn   Auto-rotate off.
In this mode, you can manually rotate the current app. Turn your phone the direction you want, then touch 
 in the corner.
Allow screen to rotate
To allow rotation for all apps, open quick settings and turn   Auto-rotate on.
You can also adjust this in Settings > Display > Auto-rotate screen
 
Tip: If your home screen isn't rotating but Auto-rotate is on, then check your home screen settings. 
Touch & hold a blank spot on your home screen, then touch Home settings > Allow Home screen 
rotation.
Adjust refresh rate
The action you see on your screen is a series of frames strung together, like a movie. A higher display 
refresh rate shows more frames per second, making the action smoother and more responsive. This uses 
more battery power.
You can adjust the display refresh rate, depending on your needs:
•
For the smoothest, most responsive display, use the highest refresh rate.
•
To save battery power, use a lower rate.
 
Note: When Battery Saver is on, the refresh rate is set to 60Hz.
To raise or lower the refresh rate:
1. Go to Settings > Display.
2. Touch Display refresh rate.
3. Select the rate.
Change text and icon size
You can make the text or other items on your screen smaller or larger for your comfort and convenience. 
You can also make text appear bolder and increase contrast to see it better.
1. Go to Settings > Display > Display size and text.
Settings : Display
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