It’s probably in there somewhere, but it’s been the Roland Way for quite a while.

In truth, I expect it’s the same procedure on all arrangers that don’t have dedicated buttons for each Intro and Ending.

There’s also another way to get direct access to all the Divisions with just one button.... All Divisions can be selected by MIDI, so this gives you the option of using MIDI pedals or tablets to select an Intro or Ending with just one press. Sadly, the Roland BK Partner app only duplicates the front panel, it’s a shame they didn’t design it to offer greater choice by having all Intros and Endings freely selectable.

And if you have an FC-7 you could do the whole thing (but back to the two press process) hands free!