ysizemode

Sets the shapes's sizing mode along the y axis. If set to "scaled", y0, y1 and y coordinates within path refer to data values on the y axis or a fraction of the plot area's height (yref set to "paper"). If set to "pixel", yanchor specifies the y position in terms of data or plot fraction but y0, y1 and y coordinates within path are pixels relative to yanchor. This way, the shape can have a fixed height while maintaining a position relative to data or plot fraction. Default: scaled.