Screenshot Key for Different OS

On Windows Desktop:

PrtScn

On Linux Desktop:

PrtScn
or
Shift
+
PrtScn
(for selected area) or
Alt
+
PrtScn

On macOS:

Shift
+
⌘ Cmd
+
3
(for full screen)
Shift
+
⌘ Cmd
+
4
(for selected area)

On Laptops (Windows/Linux):

Fn
+
PrtScn