Lenovo Yoga 13 Notebook IdeaPad - Manual (Page 9)

Chapter 1. Getting to know your computer
5
The display brightness changes with the ambient light. If you want to adjust
the brightness manually, turn off the option of Adjust my screen brightness
automatically
.
To turn off this option:
1 Open the charms, select Settings → Change PC settings → General.
2 Move the slider from On to Off in the Adjust my screen brightness
automatically in Screen.
Note: For details on how to open the charms, see “The charms” on page16.