(1) In graphical user interfaces
refers to moving an icon
or other image on a display screen
. To drag an object
across a display screen, you usually select
the object with a mouse button
(“grab” it) and then move the mouse
while keeping the mouse button pressed down.
The term drag is also used more generally to refer to any operation in which the mouse button is held down while the mouse is moved. For example, you would drag the mouse to select a block of text.