2 day touring plans?

Hi! I’m trying to plan our September trip for DH, DDs 7 & 2, and MIL. I would like to use a 2 day plan at MK. How does it work? I can’t figure out where it splits the days, and how to put it on the itinerary! What am I missing?? Thanks for any advice!

I have never used the two day plan, but. If you open the plan and edit the day, optimize, then save it as a customized plan, it is automatically saved to the itinerary.