Shutter is a feature-rich screenshot program to take a screenshot of a specific area, window, your whole screen, or even of a website
To install Shutter on linux mint 12
1.Open linux mint software manager.To open software manager in linux mint, click Menu button and select software manager or type software manager in the search field and click software manager.
2.Type shutter in the software manager search field and select shutter.
3.click the install button.
4.Type your linux mint password if needed.
5.After the successful installation close software manager and click start menu.
6.Type shutter in the search field and select shutter.