Hello!

I have a question regarding VOR navigation.

Let's assume we're tracking a radial 180 from VOR ABC.
Next we're supposed to intercept radial 090 from VOR DEF.
ABC is tuned in on NAV1 and DEF on NAV2.

Since the autopilot is coupled to NAV1 by default, how do you couple it to NAV2? If not, how would this be performed IRL on a 707?