Hello ! Sorry if my post is too short.
I, disagree a bit about the used font for previewing the code in the forum.
The first thing that I say is the proportion (width) of the font should be shorter a bit.
Second, If possible, change the font face, such as "Verdana" font is a good one.
For code, Courier New remains one of the best fonts -- if not the best. For the message body's font, I would switch it with either Tahoma or Segoe UI. Though, I find the current font selection [Arial, I think] is quite good. You have to remember that a font on your system my not be available on another system.