elapse between clicks and still allow them to be grouped as a multiple
click. Its value is in units of milliseconds. If the value is
@code{nil}, double clicks are not detected at all. If the value is
-@code{t}, then there is no time limit.
+@code{t}, then there is no time limit. The default is 500.
@vindex double-click-fuzz
The variable @code{double-click-fuzz} specifies how much the mouse
can move between clicks still allow them to be grouped as a multiple
-click. Its value is in units of pixels.
+click. Its value is in units of pixels; the default is 3.
The symbols for mouse events also indicate the status of the modifier
keys, with the usual prefixes @samp{C-}, @samp{M-}, @samp{H-},