MarkPen is a friendly screen annotation tool to mark Screen in anytime, anywhere, and any application. it can help you to create stunning slideshow easily, or review a document with your associates, or snap any application's popup menu picture at run-time, you can mark it then use 'Shift+Print Screen' to snap it into a jpeg file.It is quickly and easily from anywhere, only a single key-press, such as mouse middle button click!