I know the idea of typing something in and having a fixture magically appear has already been denied, but the way I think it would work without being to hard is just have all 26 letters and numbers 0-9 and an indicator of some sort to show that they are aligned so we don’t have to go by eye and hope. It would be even cooler if this was in the model designer so we could have different models with different text.
Before you yell at me to use the search function, I did and didn’t find anything about doing it this way.