Viewing the cursor's present position, the user readjusts the position by moving the mouse. The next click on a selected position or two quick clicks on it causes a particular action to take place on the selected object. For example, in Windows operating systems, it causes a program associated with that object to be started. The second button, on the right, usually provides some less-frequently needed capability. For example, when viewing a Web page, you can click on an image to get a popup menu that, among other things, lets you save the image on your hard disk.
Some mouses have a third button for additional capabilities.
Some mouse manufacturers also provide a version for left-handed people. In some systems, the user can also choose among several different cursor appearances. Some people use a mousepad to improve traction for the mouse ball. Although the mouse has become a familiar part of the personal computer, its design continues to evolve and there continue to be other approaches to pointing or positioning on a display. Users of graphic design and CAD applications can use a stylus and a specially-sensitive pad to draw as well as move the cursor.