Under Tools>>Autocorrect/Autoformat go to the 'Word Completion' tab and uncheck the autocomplete box.
I don't know about a hot button, that's not something I've tried.
This is driving me NUTS!!!
How do I shut off the darned autocomplete typing of words?
Also, is there a way to have a little hot-button for superscripts and subscripts??
I know I should take this to the help forums, but I know there are users here and hope someone might see this quicker.