Stepping makes Stargaze repeatedly jump forwards in time so that changes in
star or planet positions can be watched.
Begin
stepping by clicking either of two buttons...

The button to the left of the date-picker
advances the date (one week by default).
A similar button to the left of the time-picker increases the time (10 minutes
by default).
Keeping the animation going...
Double-click one of these buttons to keep Stargaze stepping continuously through
a whole year or a full day.
You can stop the animation by clicking the button again.
Making
some changes...
Select Time lapse > Settings... in the Map menu to bring up
this dialogue box:

Slider bars let you change the two step intervals
and adjust the rate of the animation.
Click Set for your changes to take effect.
The Trace option is explained on the next page.