Dell XPS 15 7590 Setup And Specifications page 19

Function key
The Fn key is also used with selected keys on the keyboard to invoke other secondary functions.
Table 23. List of keyboard shortcuts
Function key
Re-defined key (for multi-media control) Behavior
Search
Toggle keyboard backlight (optional)
Decrease brightness
Increase brightness
Behavior
Pause/Break
Toggle scroll lock
Toggle between power and battery-status light/hard-drive activity
light
System request
Open application menu
Toggle Fn-key lock
Up/page up
Down/page down
Keyboard shortcuts 19