AB Standard - 3mm treble side dots. (No "D" marker)
Z Standard - 3mm treble side dots with "D" marker.
Super Series Standard - 6mm vintage style dots. (No D)
Speedo Bars - Speedometer-inspired markers with a "D" marker at the 12th fret.
Ghost Bars - Empty speedometer-inspired markers
Ghost Blocks - Outlines in Block style.
Fretless -Macassar Ebony with segmented-lines