Thanks everyone, I've certainly learned more than I expected.
My company's default font is blockfont, which is why I couldn't get the character. latin-extended works perfectly, although the font looks slightly different to blockfont.
As the title says, I can't type an Ü letter (alt+154) in a drafting note. It appears OK in the text input box, but displays as an empty square box on the actual drawing. Is this possible? I presume Germans use NX too!
I'm on NX 10
Thanks,
Tom