Steps

The script step for an intermediate object describes it as “hidden.”

The Steps section shows all of the objects, and the mathematical construction, defined by the tool’s given objects. These include the tool’s intermediate objects (which are not displayed when the tool is used in a sketch), and the tool’s final results (which are displayed). Unlike given objects, a tool’s steps cannot be reordered: they are determined by the tool’s construction.

See also
Custom Tools
Given Objects
Working with the Object List
Advanced Tool Topics