When you want to save a thousand words by e-mailing a picture of a dialog box or browser screen or anything else that appears on your desktop.
Begin writing your message, click on the Insert tab on the Ribbon, then click Screenshot.
A tiny dialog box shows you all the current windows open on your desktop so you can choose the one you want to insert, or click on Screen Clipping and click to draw a box on screen.
Press Enter, and the contents of the box will be inserted into your message.
Click the link below to view an image of the insert tab and screenshot button in outlook 2010.