1. Identify the baseline
Choose one element and record what should change and what must stay. This example widens wall-hosted door 134-A in a disposable Revit project. Its original type measures 800 × 2000 mm, with a 900 × 2050 mm rough opening. Studio’s inspection reported 104 doors sharing that type. Locate the door in the plan before editing. Include its host, position, swing and nearby walls in the review, not just its width.
2. Prepare a separate type
Changing a shared type can affect every instance. In this attempt, Core could not duplicate the door type and made no change. Preparation was completed manually in Revit: select door 134-A, choose Edit Type → Duplicate, enter DOCS_Single_1000x2000, then click OK → OK. Only the selected door was assigned the duplicate. Its width remained 800 mm at this point; the new name described the intended size, not a completed resize.3. Request and check the edit
Ask to set the duplicate type’s width to 1000 mm, keeping the 2000 mm height, host, level, position and swing. Specify that the other doors must remain unchanged. Studio reported one instance of the new type, door 134-A, and 103 doors still using the original 800 × 2000 mm type. It reported that only the new type’s Width changed, with the host and Level 01 retained and no move or flip.
4. Inspect the change
Native Revit Type Properties confirmed Width 1000 mm, Height 2000 mm, Rough Width 1100 mm and Rough Height 2050 mm. The matching plan detail shows the wider swing and the hinge jamb meeting the perpendicular return wall.