Apple has made taking screenshots relatively simple and user-friendly on each of their devices. Why thank you, Apple.
On a MAC computer, you have two different options to take a screen shot.
1) Screen Shot the ENTIRE Screen
To screen shot your entire screen, simply press command+shift+3 on your key board, at the same time.
By pressing these 3 keys simultaneously, it will automatically take a screenshot of your entire screen and save it to your desktop as a PNG file. The screen shot will also automatically title itself as:
“Screen Shot Year-Month-Day @ Hour.Minute.Second“.
For example, if I were to take a screen shot right now, the title would be as follows:
Screen Shot 2017-12-13 at 1.44.11 PM
You can easily rename the title of your screen shot by right clicking the image, and selecting “rename” from the drop down menu.
You will then be prompted to type in the new title.
2) Screen Shot a Selected Area of the Screen
If you only want to screen shot a certain area of your screen, press command+shift+4 on your key board at the same time.
By pressing these 3 keys simultaneously, a small cursor will appear on your screen. This cursor gives you the ability to screen shot a specific area of your choice. All you have to do is move the cursor to the area you want, and drag it outwards. When dragging out, the cursor will create a rectangular/square shaped, grey highlighted area. It is important not to release your fingers from the trackpad/mouse before you’ve highlighted the entire area. Once you’ve highlighted the entire area you want to screen shot with grey, let go of the trackpad/mouse, and it will take the screen shot, saving it to your desktop.
See below for video tutorial.