Glad to help. Also, as a note, we don't have a yard either, so have always had a small pen that collapses and can be set up anywhere on the patio with a pee pad. So she knows to go on the pad, but it's always outside. Even when we have been in a hotel room, we can bring the pen, and pee pad (we make sure we have a small patio at least) and then she is all set. On one occasion, we set the pen up inside in the kitchen of a unit, with the pad.....and since she's so used to it, she knew what to do.
Now if she would just go more often on a walk now...
She's starting to more regularly.....
good luck!!