After Franz Richter Herf and Rolf Maedel, as well as after Ezra Sims, the conventional notation is completed by three additional signs (arrows) and their inversions for the degrees within the semitone.
|+1/12||+1/6||+1/4||−1/4||−1/6||−1/12||Alteration, tone fraction|
|0||→||16⅔||→||33⅓||→||50||←||66⅔||←||83⅓||←||100||Distance in cents tempered|
|91⅔||--||8⅓||--||25||--||41⅔||--||58⅓||--||75||--||91⅔||--||108⅓||Reach of hearing in cents tempered|
|||||||||||||Richter Herf / Maedel|
The additional signs apply to the respective measure, just like the conventional accidentals.
In case of Richter Herf / Maedel, these signs are placed above the notes and a diagonal slash cancels them. However, together with chords, bent arrows are used for better legibility; for example: