When adjusting the font size, there is no changes to the HTTP message section.
This is actually a different setting, since you generally want to view HTTP messages in a monospaced font, and you might want a different point size.
The option you need is right under the font size setting, under “HTTP Message Display”.
Scanner > Results > Advisory
This font size is NOT being increased.
Correct, the scan issue advisory text is not currently resizable. There is a pending request to fix this issue and we hope to have the fix in place later this year.