Syntax:
set tics {<direction>} show tics
where <direction> may be in or out. set tics defaults to in.
See also the set xtics, set ytics, and set ztics command for more control of tic marks. Using splot, in 3-d plots, 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. a zero will put it on the bottom grid and any positive number somewhere along the z axis.
Syntax:
set ticslevel {<level>} show tics
where <level> is a non negative numeric argument. For example,
set ticslevel 0.5
sets the tics level to the default value.
See also the set view.