How to capture screen on Mac

PrintScreen key is quite useful in Windows OS, we use it to capture the screen we want to save. And the "ALT +PrintScreen" made it simple to capture the active Windows. Then how to do this on Mac? Now let me introduce the hot key for you.

Command+Shift+3: like the PrintScreen key on Windows, it can capture the full screen of your computer. The screen shot will be placed on your clipboard for you to paste into another program.

Command+Shift+4: like the "ALT +PrintScreen" , helps you catch the active Windows, but it is more powerful , when you click this 3 keys at the same time, a cross-hair cursor will appear and you can click and drag to select the area you wish to capture. When you release the mouse button, the screen shot will be automatically saved as a PNG file on your desktop.

These two function is enough for the beginner, but some people want to save the video screenshots, it may be more complicated.
Screen capture also named for screen dump or screenshot. Which is a image captured from video file when it playing by screen capture software. Screen capture can be used to demonstrate a program, a particular problem or generally when computer output needs to be shown to others or archived.

You can capture screen in several steps. Firstly, the analog video will be digitized by analog-to-digital module. Then, produce color difference video data, adjust brightness, contrast, saturation and hue. Finally, generate data in conformance with any of several color space standards, such as RGB and YCbCr.