Which way do i move little knob to remove entire wiper arm?

Thanks

Pull it outwards.

So I should pull at 90 degrees to the arm?

(Gunned up by tree junk...want to make sure because no free play at all and applying more pressure than I think I should currently.)

Well as far as it goes.  I had to use a screwdriver on mine.  Mine don't rotate out, but are a little slide that moves maybe 1/8 of an inch.

From page 8R-12 of the factory service manual

 

REMOVAL (1) Unlatch and open the hood. (2) Lift the wiper arm far enough to raise the wiper blade off of the glass and permit the wiper arm latch plate to be pulled out to its holding position, then release the arm (Fig. 5). The wiper arm and blade will remain off the glass with the latch in this position.
CAUTION: The use of a screwdriver or other prying tool to remove a wiper arm may distort it. This distortion could allow the arm to come off of the wiper pivot during wiper operation, regardless of how carefully it is reinstalled.
(3) Using a slight rocking motion, remove the wiper arm pivot end from the wiper pivot