Galaxy Note 9: How do I unlock the screen using S Pen?

If the screen is locked while the S Pen is connected, you can unlock the screen by pressing the S Pen button. (Default OFF)

Please follow the steps listed below:

Navigate to Apps screen > Tap Settings > Tap Advanced features > Tap S Pen > Tap Unlock with S Pen remote > Select Unlock with S Pen remote > Tap OK

Pictorial representation of the above settings is as follows:  

Note:

ㆍ The Unlock with S Pen remote feature is available only when the screen lock method is set.

ㆍ To use this feature, the S Pen must be connected to your device.