Dell G15 5535 Owner's Manual page 19

The keys F1 to F12 at the top row of the keyboard are function keys for multi-media control, as indicated by the icon at the
bottom of the key. Press the function key to invoke the task represented by the icon. For example, pressing F1 mutes the audio
(refer to the table below).
However, if the function keys F1 to F12 are needed for specific software applications, multi-media functionality can be disabled
by pressing fn + Esc. Subsequently, multi-media control can be invoked by pressing fn and the respective function key. For
example, mute audio by pressing fn + F1.
NOTE: You can also define the primary behavior of the function keys (F1 to F12) by changing Function Key Behavior in
the BIOS setup program.
Table 13. List of keyboard shortcuts
Function key
The Fn key is also used with selected keys on the keyboard to invoke other secondary functions.
Redefined key (for multimedia
control)
Behavior
Mute audio
Decrease volume
Increase volume
Play/Pause
Toggle keyboard backlight (optional)
Decrease brightness
Increase brightness
Switch to external display
Search/G key (optional)
Print screen
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Specifications of Dell G15 5535 19