Numbering — Category and Sequence — Settings reference

Walkthrough

Control	Options	Effect
Category	Columns, Foundations, Framing, Floors, MEP, Rooms, Walls and others	Choose the Revit category that owns the destination parameter.
Range	Project / Active View / Select Multi / Select One By One	Limit edits to the project, active view, a group selection or one-by-one selection.
Target parameter	Writable category parameter	Choose a writable parameter such as Comments; the example leaves native Mark unchanged.
Format	Prefix / suffix / start / digits / step	Combine prefix, suffix, start, zero-padded digit count and increment to create each label.
Order	Eight visual rules	Choose one of eight visual spatial ordering rules, then audit the first and last result.

Evidence boundary: Structural column Comments T-0028 output verified.