Here is a key sequence I use very often. It takes a screenshot of a chosen window without the window's shadow. - First, type command + shift + 4 (the mouse pointer turns into crosshair). - Then type the space bar (the crosshair turns into a camera icon). - Hover the mouse pointer (a camera icon now), to highlight the chosen window. - Finally, hold the option key and click. This sounds like a lot of steps but it becom…
Add in the control key in the shortcut above and the screenshot will go to the clipboard instead of a file. Useful for pasting a screenshot into something like Messages or Slack. Also there's no need to hold down Option when clicking. You can however hit Esc to cancel the screenshot action.
Combination of CTRL+OPTION works too.