Yeray, could you point me to method of manually drawing minor grid lines.

Hope I have that title correct. I'm referring to hovering over a series point with the pointing device.

Default behavior appears to display the y value only. I would like to display both x and y values.

Is there a way to accomplish this?

When the axis is logarithmic the minor grid intervals are not sensible. Minor grid lines should be at log2, log5, etc. In log space, if the number of minor grids is 1 it should be at 3; if 2, at 2, 5; if 3, at 2, 5, 8, etc. This could be the default. Users may want to have other choices. Best would ...