change user dictionary in a document after it's created
I have a document that was created with US English as its default dictionary.
I want to spell-check it with the UK Englsh dictionary and although I can select UK English in the user dictionary panel, it doesn't make any difference and reverts to US English as soon as I close the panel.
The same happens in reverse: With UK English as my default dictionay, any document created will be fixed to US English for spell-checking and selecting UK English has no effect.
Is there a way to change a document's "default" dictionary after it's created?