Is there a way to view a transaction using a different form without changing which is the selected form for everyone?

change form in UI, don’t save

But I want to print it which is only available in view mode

We've used scripts to force / lock the form for certain roles and individuals, but it's ended up a little easier to maintain a script to print a specific template and only show a button for specific roles / users.

Use the print checks and forms feature. There you can select what form you want to print