How do I add a machine, material, or finishing op?
Short: Settings → Machines / Materials / Secondary Ops. Each has an Add form at the bottom.
Each one of those tabs has a list at the top showing what's already configured and a form below for adding new entries. Click Add and fill in the fields - they all default to common starting values, so you can save fast and refine later.
Edits go through the same form: click "Edit" on any row to populate the form, then save. The cost engine picks up changes immediately on the next quote.