Syntax:
set tics {<direction>} show tics
where <direction> may be in or out. set tics defaults to in. show tics displays a lot of information about the tics.
It is now necessary to do
set xtics nomirror ; set ytics nomirrorin order to switch off the duplicate tics on top and right borders. This is useful when doing impulse plots.
See also the set xtics, set ytics, and set ztics commands for more control of tic marks and set mxtics, set mytics, and set mztics for minor tic marks.