Acer Predator 21 X - Windows keys; Alternative WASD and space key-caps

Using the keyboard - 19
Windows keys
The keyboard has two keys that perform Windows-specific
functions.
Key Description
Windows key
Pressed alone it returns to the Start
screen or to return to the last open
app.
It can also be used with other keys
f
or special functions, please check
Windows Help.
Application key
This key has the same effect as
clicking the right mouse button; it
opens the application's context menu.
Alternative WASD and space key-caps
A set of alternative kep-caps have been provided with your
computer.
Use the provided tool to extract the keys from the
accessory box. Use the same tool to carefully remove the
same keys from the keyboard, and then insert the
replacement keys in the appropriate locations.
Note
You can turn these keys off and on in the PredatorSense
application.