Used With Routines:   AXIS, BAR3D,   BOXPLOT,   CONTOUR,   CONTOURFS,   CONTOUR2,   OPLOT,   PLOT,  SHADE_SURF,   SHADE_SURF_IRR,   SURFACE

Corresponding System Variable:   !P.Ticklen

Controls the length of the axis tick marks, expressed as a fraction of the window size. The default value is 0.02. Ticklen of 0.5 produces a grid, while a negative Ticklen makes tick marks that extend outside the plot region, rather than inwards.

To produce outward-going tick marks of the normal length:

PLOT, X, Y, Ticklen = -0.02

To provide a new default tick length, set the system variable !P.Ticklen.