Easy Chart: How to choose axis for displaying grid lines


on an Easy chart component I have several axes displayed. The horizontal grid lines are obviously displayed for one axis only. It seems as if the grid lines are shown for the axis which comes first in alphabet for each subplot; and also uppercase, lowercase matters.
So if you have two axes in a subplot, Temperature and Flow, the grid lines will be displayed for Flow. If you change the name of Temperature to ETemperature, the grid lines will be displayed for ETemperature. Also if you change it to FTemperature the lines for that will be displayed (uppercase before lowercase). The same is also true if you change ‘Flow’ to ‘flow’.

Is there a possibility to choose for which axis the grid lines are being displayed apart from changing its name?