As explained here, a graphset is an object used to group series and plot them against
different scales. JetChart uses the full extension of the vertical axis to arrange scales. If series
are grouped into more than one graphset, each graphset scale is, by default, arranged along the left vertical
axis, in which case the scales labels overlap each other. If only two scales are displayed, a workaround is to
move one of the scales to the right vertical axis. However, if more than two scales are displayed, the only
solution is to stack the graphsets vertically, setting the start and end scale points in terms of fractions
of the full vertical y axis extension.
Scale edges can be manually set or automatically calculated. The following example displays three series grouped
into three graphsets. The scales edges are manually adjusted to prevent graphsets from overlapping.