Help with stepping and sizing value

You do not say what axis, or if it is both. If it is just one, the rotary can still be selected somewhere.

You did record the settings before changing them, right?

You should only be changing the step parameters in the Rotary setup window.

Trial and error. You have the steps right when you have exactly one rotation of the chuck or roller using the Test button.

This rarely solves any problems.

Here are some links you might find useful.