How do you move an "outdoor" cat?

GraceCat wrote:

I eventually had to return our cat back to her previous home because she
stopped eating, started hiding and became depressed. We're going to try
again with a smaller kitten once the house is built. But this time, it's
gonna be an inside/outside rather than strictly outside.

Mine had always been indoor/outdoor, but when I moved from Pasadena my
new place was a town-house, with just a teeny cemented patio, so I was
keeping the cats in. (They had their own bathroom - the place was
three-bedroom, two bath plus den.) My other cat was perfectly happy
with the arrangement (but he had been a stray before he found me). It
was just Miu who objected to his new home so strongly!