How do I take a screenshot?

Here are instructions on how to take a screenshot:

PC
1. Get to the screen that you wish to take a snapshot of, make that screen your active window.
2. Find a key on your keyboard labeled PRINT SCREEN - SysRq or prt scrn - sys rq
3. Press it once (To only capture the active window, press and hold down the Ctrl key and then press PRINT SCREEN - SysRq).
4. If you wish to crop it down, open your favorite picture editing program (Windows (TM) Paint© recommended)
5. Open your e-mail program and create a new message.
6. Paste the image you took by holding CTRL + V in the body of the message.

Mac

How to take a screenshot of your entire screen

1. Press Shift-Command (⌘)-3.
2. Find the screenshot as a .png file on your desktop.
   

How to take a screenshot of a selected portion of your screen

1. Press Shift-Command-4. The pointer changes to a crosshair.
2. Move the crosshair to where you want to start the screenshot, then drag to select an area.
   While dragging, you can hold Shift, Option, or Space bar to change the way the selection moves.
   
3. When you've selected the area you want, release your mouse or trackpad button. To cancel, press the Esc (Escape) key before you release the button.
4. Find the screenshot as a .png file on your desktop.

iOS Device

1. Press and hold the Sleep/Wake button on the top or side of your device.
2. Immediately press and release the Home button.
3. To find your screenshot, go to the Photos app > Albums and tap Camera Roll.

Android

As there are a number of different devices that use the Android OS, it is suggested that you Google your device and "How to take a screenshot" for specific instructions on taking a screenshot.