Redline the way you already do
The usual conventions: red to add, green to remove, notes for comments. Or write the change out in plain language.
P&ID redlines
Your redlines, drafted into the drawing.
Red to add, green to remove, a note for anything else. Mark up the drawing in Verno the way you would on paper, and Verno drafts the change into the native CAD file, then shows you the result before anything is saved.
The redline loop is the slow part.
A process engineer marks up a PDF. The markup goes to a drafter, waits in a queue, comes back as a new revision, gets checked against the redlines, and often goes round again.
Meanwhile the line list, valve list and instrument index still show the old design until somebody remembers to update them.
How Verno handles it
Drafted in the native file
Changes land in the DWG/DXF itself, in your layers and symbols, on the current version of the file.
Grouped into changes
Several markups that belong together, such as a pump, its valves and its strainer, are handled as one change.
Reviewed before it lands
You see what was drafted and why. Accept it, decline it, or ask for a different approach.
Documents follow
The lists and registers the change touches are updated in the same pass.
Every revision kept
A full audit trail of what changed, between which revisions, and who accepted it.
Ask it
What engineers say to Verno.
“Add standby pump P-101B with its isolation valves and strainer, mirrored from P-101A.”
“Delete this high-high level switch and the line it sits on.”
“Replace the placeholder tags with final line and valve numbers, across the set.”
“Show me everything that changed between Rev 0 and Rev 1, and who accepted it.”
Common questions
What is a P&ID redline?
A redline is a markup on a P&ID showing a change: typically red for additions, green for deletions and clouds or notes for comments. A drafter then incorporates the redlines into the CAD drawing and issues a new revision.
What does it mean to incorporate redlines?
Incorporating a redline means actually writing the marked-up change into the drawing file, not just approving it. Verno drafts the incorporation; an engineer accepts it before it is written.
Do we have to change how we mark up drawings?
No. Verno's markup tools follow the conventions drafters already know: red to add, green to remove, notes for comments.
Does Verno work without AutoCAD open?
Yes. Verno edits the DWG/DXF file directly, and the result opens in AutoCAD like any other revision.