When someone asks you to drag something in a
windowing system, they mean you should do these
things:
Using your
mouse (or other
pointing device), move the
cursor until it is positioned on the thing they want
you to drag.
Press and hold a mouse button. (If they don't specify,
they probably mean the left button; see
`click' for more information on multiple mouse buttons.)
Move the mouse to some new position, and then release
the button you have been holding since step 2.