| void tickht (height) | SVC.C | Level 2 |
| float height | The height of the tick marks in inches (or cm) on a full-page output. A negative height will cause the tick marks to point outward. Otherwise they point inward. The default height is 0.07 inches on the default output page. |
| tickht() gives you full control over the appearance of tick marks on all plots. Most journals prefer ticks to point inwards. |