Works just great

I almost didn’t downloaded this tool because of the following comment:

Note that this only adjusts the font size of the content in the “sidebar” as defined by your WP theme.

It simply isn’t true!!!
You’re able to adjust the size for predefined pieces of text.
Standard it says “body”. Simply add: “body, p, li” (and other body tags you’ll need.)
Don’t quite understand the low rating.
Works great!!!