When I'm authoring in text style (Alt-7), I'll often include inline math. Whenever I enter two or more consecutive letters (e.g., $ax^2$), Mathematica will automatically "romanize" (or "un-italicize") the letters (e.g., ax$^2$). Is there any built-in way to prevent Mathematica from doing this? (I'm sure there's probably a programmatic way, but I'm not experienced in that). Thank you
Enter an invisible space between
x using the shortcut Esc+is+Esc, or a very thin space using Esc+Space+Esc.
Very thin space: