I know that there is a "date and time stamp" in the Header and Footer section
but I'm running out of margin to do the Header and Footer.
How can I have a date and time stamp in the cell for printing purpose?
I've tried =now(), but the thing is now() update only when the sheet is
first open, and it won't update when I'm getting ready to print, and I don't
want to press F9 to "refresh" the formula every time I need to print.

Is there a way to work around the formula so it will update the time every
time I print, just like the way the Header and Footer work?

Thanks,