Adding cosmetic threads to a shaft or hole in a model did not give expected results. I would have expected a surface texture map or some feature easily seen. Is there a way to display these threads?
I'm guessing @S550Stang was looking for a graphical representation of the threads without necessarily having to create the geometry. Other CAD packages already do this, as shown in the picture below from Inventor. Creo unfortunately does not, and will not in the foreseeable future.
There are several product ideas around this that you can vote for and were acknowledged by PTC in 2018:
You could do your own thing via a mapkey, a bit like I recently explained here: https://community.ptc.com/t5/Part-Modeling/Calculating-surface-are-of-a-threaded-hole/m-p/700790/highlight/true#M35041
Instead of searching for a quilt, make a query that searches for surface by feature, type = has thread, AND by surface, type = cylindrical. I haven't found a way to only find solid surfaces, so this will color the quilt as well, but that probably doesn't matter. Then apply a specific appearance on it. You could even get real fancy and make multiple queries that filter on thread diameter and/or pitch, applying different appearances to each.
Of course, it wouldn't be automatic, and you'd have to press the mapkey every time you add new holes to update.