.textAlign(PVAlignment.CENTER).textBaseline(PVLabel.TOP);
// y axis grid labels
getChart().add(PV.Rule).data(scaleY.ticks()).bottom(scaleY).left(0)
.strokeStyle(GRIDLINE_COLOR).width(chartWidth).add(PV.Label)
.text(new TickFormatFunction(scaleY))
.textAngle(ANGLE_90_DEGREES).textAlign(PVAlignment.CENTER)
.textBaseline(PVAlignment.BOTTOM);
// horizontal grid lines
getChart().add(PV.Rule).width(chartWidth).bottom(0).left(0)