Screenshot taking

macOS screenshot hotkeys

Copy screenshot of window to clipboard

Ctrl + ↑   Shift + ⌘ Cmd + 4 then Space then Mouse movement then Mouse left click

All hotkeys for Screenshot taking

Taking screenshot in Windows
Copy screenshot of entire screen to clipboard, save it to Pictures\Screenshots folder

Win + Print Screen

KDE / GNOME screenshot keys
(then set the name and click "Save") Save screenshot of entire screen as file

Print Screen

KDE / GNOME screenshot keys
(then click "Copy to Clipboard") Copy screenshot of window to clipboard

Alt + Print Screen

Taking screenshot in Windows
Copy screenshot of selected area to clipboard (Windows 10)

Win + ↑   Shift + S

macOS screenshot hotkeys
Save screenshot of entire screen as file

↑   Shift + ⌘ Cmd + 3

macOS screenshot hotkeys
Copy screenshot of entire screen to clipboard

Ctrl + ↑   Shift + ⌘ Cmd + 3

macOS screenshot hotkeys
Save screenshot of window as file

↑   Shift + ⌘ Cmd + 4 then Space then Mouse movement then Mouse left click

macOS screenshot hotkeys
Save screenshot of selected area as file

↑   Shift + ⌘ Cmd + 4 then Mouse movement

macOS screenshot hotkeys
Copy screenshot of window to clipboard

Ctrl + ↑   Shift + ⌘ Cmd + 4 then Space then Mouse movement then Mouse left click

macOS screenshot hotkeys
Copy screenshot of selected area to clipboard

Ctrl + ↑   Shift + ⌘ Cmd + 4 then Mouse movement

KDE / GNOME screenshot keys
Copy screenshot of entire screen to clipboard

Ctrl + Print Screen

KDE / GNOME screenshot keys
Copy screenshot of active window to clipboard

Ctrl + Alt + Print Screen

KDE / GNOME screenshot keys
(then click "Copy to Clipboard") Copy screenshot of selected area to clipboard

↑   Shift + Print Screen

KDE / GNOME screenshot keys
Screencasting

Ctrl + ↑   Shift + Alt + R

Similar combinations for other applications