Happy New Year 2014! Doing some housekeeping and software updates, found this information was buried in the photo galleries.
Here’s how to remove the knob on a Fluke 70-series DMM (the older, rectangular-style meters.) This includes the original and series II models 75, 76, 77, 79, 21, 23, 29, and similar.
To re-install the knob, place the pointer in the VAC position to avoid damaging the tiny plastic end stops. Push down on the knob, applying even pressure until it snaps back into place.
Related: Fluke 170-series Knob Removal