The TDrawFont structure

 // DrawFont
 TDrawFont      struct
  Result                sbyte      // The function call result. NO_ERR means it succeeded.
  Location      TLocation  // The location on screen.
  Filename      byte[]     // The filename of the font.
  Text          byte[]     // The text to draw on the LCD.
  Options           dword      // The options to use when writing to the LCD.
 TDrawFont      ends

See Drawing option constants for valid Options values.