LGF, I assume you are in the Text Tool at the end of the word.

If you hold down Alt while using the Number Pad and type 0174, it works. NumLock has to be on.
If instead you insert a Symbol ®, you then need to Superscript it.

You can further change the ® size and change the Baseline height.

Having done this the once you can Copy (Ctrl+C) & Paste (Ctrl+V) or Paste Attributes (Shift+Ctrl+A).

Acorn