Set whether axis ticks and gridlines are above or below most artists.
This controls the zorder of the ticks and gridlines. For more information on the zorder see Zorder Demo.
- bbool or 'line'
True (zorder = 0.5): Ticks and gridlines are below all Artists.
'line' (zorder = 1.5): Ticks and gridlines are above patches (e.g. rectangles, with default zorder = 1) but still below lines and markers (with their default zorder = 2).
False (zorder = 2.5): Ticks and gridlines are above patches and lines / markers.