@item @var{x}, @var{y}
-These are the pixel-denominated coordinates of the click, relative to
+These are the pixel coordinates of the click, relative to
the top left corner of @var{window}, which is @code{(0 . 0)}.
For the mode or header line, @var{y} does not have meaningful data.
For the vertical line, @var{x} does not have meaningful data.
an image object as returned by @code{find-image} if click was in an image.
@item @var{dx}, @var{dy}
-These are the pixel-denominated coordinates of the click, relative to
+These are the pixel coordinates of the click, relative to
the top left corner of @var{object}, which is @code{(0 . 0)}. If
@var{object} is @code{nil}, the coordinates are relative to the top
left corner of the character glyph clicked on.
@item @var{width}, @var{height}
-These are the pixel-denominated width and height of @var{object}.
+These are the pixel width and height of @var{object} or, if this is
+@code{nil}, those of the character glyph clicked on.
@end table
@sp 1