Macintosh computers allow a variety of screen capture options.
Screenshots using Keyboard Shortcuts.
Shift + Command + 3 (⇧⌘3) captures the entire screen in its current form as a Portable Network Graphics image and labels the file with date and time.
Here's and example of a screenshot using Shift + Command + 3:
Shift + Command + 4 (⇧⌘4) allows the user to draw a selection box and capture the contents of the box. Here's a video of the feature in action:
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Here's the screenshot from the capture shown in the above video:
Screenshots using Preview.
The Mac OS includes a program called Preview which allows both of the above styles of capture, and allows capture of individual windows as well. These features are accessed in the program's File pulldown menu.
Here's an example of a window capture from the above screen:
Here's a second example of a window capture from the same screen:
