Samsung Galaxy S8 User Manual

Settings204
One-Handed Mode
Change the screen layout to accommodate operating 
your device with one hand.
1. From home, swipe up to access Apps.
2. Tap  Settings >  Advanced features  > 
One-handed mode.
3. Tap On/Off  to enable or disable the following:
• Gesture : Swipe up diagonally from either 
bottom corner to reduce the display size.
• Button : Tap  Home three times in quick 
succession to reduce the display size. 

Wallpapers 
and Themes
You can change the appearance of your device with 
custom wallpapers, themes, and icons. 

Settings206
Wallpapers
You can change the wallpaper for the Home and lock 
screens.
To change wallpaper:
1. From home, swipe up to access Apps.
2. Tap  Settings >  Wallpapers and themes  > 
Wallpapers .
For more information, see  “Change the Wallpaper ” on 
page  28.
Themes
Themes are packages of visual content that provide 
different wallpapers and icons for your phone.
1. From home, swipe up to access Apps .
2. Tap  Settings >  Wallpapers and themes  > 
Themes .
3. Tap a theme to view a preview of the...

Settings207
Icons
Apply custom icons to replace built-in app icons.
1. From home, swipe up to access Apps.
2. Tap  Settings >  Wallpapers and themes  > 
Icons .
3. Tap an icon set to view a preview of the icons.
• Tap View all  to see all available icon sets.
4. Tap Apply to apply the selected icon set.
Always On Displays 
(AODs)
Apply custom layouts for the Always On Display. For 
more information, see  “Lock Screen and AOD Settings” on 
page  223.
1. From home, swipe up to access Apps .
2. Tap...

Device 
Maintenance 
Device maintenance provides an overview of the 
status of your device’s battery, storage, memory, and 
device security. You can also automatically optimize 
your device’s system resources. 

Settings209
Quick Optimization
The quick optimization feature improves device 
performance through the following actions:
• Identifying apps that use excessive battery power 
and clearing unneeded items from memory.
• Deleting unnecessary files and closing apps running 
in the background.
• Scanning for malware.
To use the quick optimization feature:
1. From home, swipe up to access Apps .
2. Tap  Settings >  Device maintenance .
3. Tap Optimize now .
Battery
Monitor your phone’s battery usage through...

Settings210
• App power monitor: Put apps to sleep so that 
they do not use battery power when not in use. 
Tap  Save power to enable.
• Unmonitored apps : Select apps to exclude from 
being put to sleep by the App power monitor.
•  More options :
 -Advanced settings : Configure notification 
settings, the app power monitor, and choose 
whether or not to see the battery percentage 
on the status bar.
Performance Mode
Optimize your device’s performance features to best fit 
your usage.
1. From home, swipe...

Settings211
Storage
The Storage settings menu lets you manage internal 
and optional installed SD card (not included) storage 
on your phone.
Access Storage Settings
1. From home, swipe up to access Apps.
2. Tap  Settings >  Device maintenance > 
Storage .
3. View memory usage for the different types of 
information stored in your phone’s memory. 
4. Tap an item for more information.
Note : Tap Clean now to free up storage space by 
removing unneeded files.
Memory Card (SD Card)
Once an optional memory...

Settings212
Remove a Memory Card
Warning: To prevent damage to information stored on 
the memory card, unmount the card before removing it 
from the device.
1. From home, swipe up to access Apps .
2. Tap  Settings >  Device maintenance > 
Storage .
3. Tap  More options > Storage settings .
4. Under Portable storage , tap your SD card, and then 
tap  Unmount .
5. Remove your memory card from the device.
Format a Memory Card
Warning: When formatting an SD card, you should back 
up your music and photo...

Settings213
Memory
Check the amount of available memory. You can close 
background apps and reduce the amount of memory 
you are using to speed up your device.
1. From home, swipe up to access Apps.
2. Tap  Settings >  Device maintenance > 
Memory .
• The used and available memory are shown.
3. To free up as much RAM as possible, tap  Clean now 
and follow the prompts.
• The selected apps and services in the list will be 
closed.
Language and Input
Your phone’s language and input settings let you select...