With a notebook open, I try to change, just for that notebook, the Input and Output styles by doing Format | Edit Stylesheet, then selecting from the scroll down Input and then go to Format | Font, and then choose the font. I do the same for Local definition for style "Output" as well.
Problem is, neither one 'takes'. The default style for both those remains in effect for both the existing cells and newly created cells of those types. When I do the same for Local definition for style "Text" it does take effect, for both existing and newly created text.
What am I missing, besides great deal of experience changing styles of anything?
-Brian