Timer Reset with a Switch

It would be helpful to be able to reset a timer with any switch. For example, I'd like to start a count up timer when I flip my motor switch on, and then have that timer reset to 0 when I flip that switch off, without having to press a separate button. Adding another timer mode which automatically resets the timer when it's disabled would accomplish the same thing. If there's a way to do this, I haven't found it.

Thanks,
Randy