Screen Font
Preferences: Content Index

Font:
This window displays font names which are available on your system. Selected font will display in open documents.

Size:
Select the size of the font.

Style:
Check appropriate option... Bold = Bold and/or Italic = Italic.

Editor Display:
Will preview the above changes live. When you are satisfied with your selection click Apply! to convert opened document. Finally click OK! the make the changes permanent.