No, you do not have to tune flat to keep a guitar in tune
I've seen a many opinions floating around on how to tune an electric guitar. Some say tuning to exactly what a chromatic tuner states is the right way, while others say it's totally wrong and you should tune certain strings flat.
Which is correct?
On the American Vintage '65 Fender Jazzmaster, the control knobs are the "witch hat" white style (or close-to-white as they may be parchment colored), and look like this:
Above are the Fender Cabronita Telecaster Thinline in Shoreline Gold and the Gibson SG Deluxe in Orange Burst.