Does anyone know how to set a special font for comments in TexShop? I would like to have it in italic with gray colour. I used to use LaTex on Ubuntu and I just turned to Mac, I'm therefore not familiar with TexShop fonts.
It's not possible to select different fonts/fontshapes for syntax highlighting in TeXShop. You can only set colours. See also Syntax: De-highlighting Certain Commands in TexShop.