Capture OSX Screen with screenshot

Almost once a day I take a screenshot of something on my screen.  Here are the commands I use.

Press the following three keys:

[COMMAND]+[SHIFT]+[4]  To capture a screen with crosshair pointer with mouse area selection

[MOUSE CLICK and HOLD] to select the area

[MOUSE CLICK and HOLD] + [SPACE] to position selection

[MOUSE CLICK and HOLD] + [OPTION] to mirror select

[MOUSE CLICK and HOLD] + [SHIFT] to fix one dimension of the selection

[MOUSE CLICK and HOLD] + [ESC] to not capture screen

[MOUSE CLICK and RELEASE] to capture the area

[COMMAND]+[SHIFT]+[3] To capture the whole screen.

FULL REF: https://support.apple.com/kb/PH11229

The screenshots get dropped into your desktop in PNG format.  So if you don't like it change it like this:

$ defaults write com.apple.screencapture location [enter_path_here]
$ killall SystemUIServer

To change it back:
$ defaults write com.apple.screencapture location ~/Desktop
$ killall SystemUIServer