I've tried it in the property pallet, but it didn't work. I have tried it in annotation, it worked but it didn't produce the character I expected when using the numpad I am used to, e.g. ° (Alt-248). Is there a table for the list of characters and their number? Also, how can that be entered into a table cell?
Now I have to do copy/paste operation which works fine. I use Alt-Codes a lot in my daily work for mathematical signs and such to make drawings look crispier. It would be nice if there is a way to do it. Otherwise, I'll just mark this as a solution with Annotation text input only.