Gets or sets the display mode for the Axis major inside
"cross" tic marks.
true to show the major cross tic marks, false otherwise
The "cross" tics are a special, additional set of tic marks that
always appear on the actual axis, even if it has been shifted due
to the Cross setting. The other tic marks are always
fixed to the edges of the Rect. The cross tics
are normally not displayed, since, if CrossAuto is true,
they will exactly overlay the "normal" and "inside" tics. If
CrossAuto is false, then you will most likely want to
enable the cross tics.
The major tic spacing is controlled by MajorStep.
