Disable grid lines in trend XY

Disable grid lines in trend XY

Hi,
I have to make some trends XY using zenOn 6.22 SP1 Build4.
Unfortunately, in addition to the graph; displays a horizontal line that represents the value taken from the memory (I enclose sample image).
I noticed that the color of this line is related to the color of the grid, but I could not eliminate it altogether.
it is possible to disable the reference lines in question?
Sincerely,
Alessandro.

This is a migrated post! Originally posted on 27.03.2013 by user galax. Please be aware that information can be outdated.