How can I take screenshots on computer and mobile device?

When you want to capture screenshot, you can follow the steps below.
iOS;
* On the iPhone model with Face ID, you can take a screenshot by pressing the side button and the volume up button at the same time.
*If your iPhone has a home button, you can take a screenshot by pressing this button and the side/up button at the same time.
Android;
* You can take a screenshot by pressing the Power and Volume Down buttons at the same time.
Windows (computer);
You can capture screenshot of the entire screen with the Fn + Print Screen (PrtScn) Keys.
You can capture screenshot of a single window with Alt + Print Screen Keys.
You can capture screenshot using the Win + Shift + S built-in Snip & Sketch tool.
OS X (Mac);
*How to capture screenshot on your Mac;
Shift, Command, and 3 Press and hold these three keys together, then you will see a thumbnail in the corner of your screen, click to edit the screenshot and wait for the screenshot to be saved on your desktop.
*How to capture part of the screen;
Shift, Command and 4 Press and hold these three keys together and then drag the plus sign to select the area of the screen to capture. To move the selection, you must hold down the Space bar as you drag.

You can send the screenshot you took by clicking the attachment in the lower right corner of the chat screen.