ticslevel

Using splot, one can adjust the relative height of the vertical (Z) axis using set ticslevel. The numeric argument provided specifies the location of the bottom of the scale (as a fraction of the z-range) above the xy-plane. The default value is 0.5. Negative values are permitted, but tic labels on the three axes may overlap.

To place the xy-plane at a position 'pos' on the z-axis, ticslevel should be set equal to (pos - zmin) / (zmin - zmax).

Syntax:

      set ticslevel {<level>}
      show tics

See also set view.