I have a layout that I want to view a list of names, stacked or 1 on each line.

But when I print that as a label (separate layout), I don

You need two layouts.

Use a script for the printing and you'll never have to see the printing layout.

Edited: Woops I'm sorry I didn't read your question correctly. Here's one way to do what you're asking, there may be a better way... You could set up a temporary global field for the printing layout and then use a script to put the names in there, separated by commas, one by one.

ie: every time you print you run a script, that script loops through the records and adds each name to the global field one by one, then goes to the printing layout and prints it.