YMOD

Syntax: | `SET YMOD n GET YMOD { n }`
Default: | `YMOD = 0`

`YMOD` is another control on the numbering for the y-axis.

value | meaning
`YMOD > 1` | the numbers displayed on the y-axis are modulo `YMOD` and positive. If the number to be displayed on the axis is `N` then the number that is actually displayed is `|N-YMOD*(N/YMOD)|+YOFFSET`
`|YMOD| ≤ 1` | the numbers will be displayed normally
`YMOD < -1` | the numbers will be modulo `|YMOD|` and may be negative