- <td>A function to call when the zoom window is changed (either by zooming in or out). minDate and maxDate are milliseconds since epoch. minValue and maxValue are y-axis range values.
+ <td>A function to call when the zoom window is changed (either by zooming in or out). minDate and maxDate are milliseconds since epoch. yRanges is an array of [bottom, top] pairs, one for each y-axis.