Samsung 2043SN - Manual (Page 85)

Customized key
You can customize key assignment for the Custom button according to your preferences.
To view the operating screen displayed when pressing the [ ] button after configuring the
customized key for a function, click the name of each function.
(Image Size - MagicBright - MagicColor - Color Effect)
Note
You can configure the customized key for a required function via Setup > Customized
Key
.
Adjusting the Monitor