TITLE(locator @@ Graphical Input)
USAGE(
locator(n=1)
)
ALIAS(locator)
DESCRIPTION(
LANG(locator) reads the position of the graphics cursor when
the (first) mouse button is pressed.  Unless the process
is terminated prematurely by the user (see below) at most
LANG(n) positions are determined.
PARA
The input process can be terminated prematurely by
pressing any mouse button other than the first,
or by clicking outside the graphics window.
)
VALUE(
A list containing LANG(x) and LANG(y) components which are
the coordinates of the identified points.
)
