How do you create a functioning toolbar in your design?

What do you mean? I think you’ll have to add more details about what you’re trying to achieve for any real support. If you mean you want to make a tool set that actually functions in a prototype then the answer is you can’t. You can make a set of mocks that show the idea but they won’t be actually be functional like inside a working app. Framer will get you closer in that area if that is what you’re asking.

That’s exactly my question. Thank you, Toby! I really appreciate it!