[Feature request] Is there a way to customise the precision of the Y-axis lines for graph2D visualization?

[GO5IT]

I have not found how to custmise the precision of the Y-axis lines for graph2D visualization. The documentation only says, the data should be a number.

When I used float numbers for testing, I managed to see a line for each 0.25, but I don't know if I can change the setting. If there is, can somebody let me know how to configure it with an example, and ignore the feature request?

Also, I am wondering what the lowest granularity of the precision would be. Thank you!