Wiper and headlamp swith knobs

How do I remove the knobs for the headlamp and wiper switches on a 1977 Ford F150 truck?

reach under the dash on the head light sw there is a small push button it close to the dash side on the flat part of the aluminum bracket push in on it and pull on the knob then unscrew the front ring wiper switch you take a small screw driver or pick and and release the knob by pulling a spring clip to the know on the back by the front of dash