Assume that the current model has four parameters:
| XSPEC> steppar 3 1.5 2.5 | | Step parameter 3 from 1.5 to 2.5 in steps of .1. |
| XSPEC> steppar log | | Repeat the above, only use multiplicative steps of 1.0524. |
| XSPEC> step nolog 2 -.2 .2 20 | | Step parameter 2 linearly from -.2 to .2 in steps of 0.02. |