Because most TPTQ Arabic fonts come in more than four styles, they donʼt support style linking in the way that Arial or Verdana does. Arial consists of four styles, and clicking on the B icon in your typesetting application changes the font to Bold style. Fedra, however, consists of 10 styles, so clicking the B icon doesnʼt work, (but switching to Italic by clicking the I icon works, since most of our styles contain italics).
Microsoft Office works the best with font families of four styles, so I, B buttons can be clicked to access Italic and Bold. Typotheque offers Screen fonts, e.g., Fedra Sans Screen, Fedra Serif Screen, Fedra Mono Screen to work in Microsoft Office applications.