Font style.
These can be combined. 0 = Normal font (default)
Bit 0 = 1 = Bold Bit 1 = 1 = Crossed out
Bit 2 = 1 = Underlined
Bit 3 = 1 = Italic
Bit 4 = 1 = Inverted colour
Bit 5 = 1 = Flashing between inverted colour and the styles set by bits 0–3
Bit 6 = 1 = Flashing of both the background and the foreground between Invisible and the styles set by bits 0–4. Bit 6 takes precedence over bit 5. The entire text object is hidden in the “invisible” cycle
Bit 7 = 1 = Proportional font rendering (if this bit is zero, non-proportional font rendering is used)