How to Take Photos of a Computer Screen

Windows 7

Find what screen you want to take a picture of.

Press the "Print Screen" button in your keyboard.

Open Paint.

Click the "Paste" in the top left corner.

Now, your screen you print/copy is there.

Save your picture.

Mac

Press Command (⌘)-shift-4 altogether

Release those keys and press the spacebar

Click on the window you want to take a picture of.

Now, the picture is saved.

Windows

Press the "Print Screen" button in your keyboard

Go to Paint

Press Ctrl and V together

Release

The picture will now be open in the Paint window.

iOS (iPhone, iPad, iPod Touch)

Press the Home button and the Sleep/Wake button together.

The picture will be in your Camera Roll.