Drag and drop
From Mac Guides
Drag and drop is a term used to describe moving an object on the computer screen with your mouse. It is done by clicking and holding an object, such as a file, then moving the mouse (dragging), and releasing the mouse button once the mouse cursor has reached its destination (dropping). Drag and drop has a number of uses, including:
- Moving a window
- Moving files between folders
- Openings files in applications (by dragging a file to the application icon)
- Moving or copying text between documents or applications
- Saving images from a website (by dragging them to the Finder)
There are many other uses for drag and drop, and almost every Mac OS X application supports it.

