Opening Marks¶

Flow uses a consistent marking system for windows, doors and curtain walls.

These marks are used throughout the Openings Manager workflows, including opening views, guided renumbering and documentation checks.

Standard Opening Marks¶

Flow recognises four primary mark sequences:

Opening	New	Existing
Window	`W##`	`Wx##`
Curtain Wall	`W##`	`Wx##`
Door	`D##`	`Dx##`

Examples include:

W01
W02
Wx01
D01
D02
Dx01

Windows and curtain walls share the same W / Wx numbering sequence.

Doors use their own D / Dx sequence.

New Openings¶

New windows and curtain walls use:

W##

New doors use:

D##

For example:

W01
W02
W03

D01
D02
D03

Existing Openings¶

Existing windows and curtain walls use:

Wx##

Existing doors use:

Dx##

For example:

Wx01
Wx02

Dx01
Dx02

The x distinguishes Existing openings from the New opening sequence.

Curtain Wall Marks¶

Curtain walls participate in the Window numbering sequence.

For example, a project could contain:

W01  Window
W02  Window
W03  Curtain Wall
W04  Window

Flow does not maintain a separate curtain wall numbering sequence.

Duplicate Marks¶

The Openings Manager audit checks for duplicate marks.

Windows and curtain walls are checked together because they share the same mark sequence.

Doors are checked within the Door sequence.

Duplicate or inconsistent marks can be identified through the Openings Manager register.

➡️ Reviewing Openings

Non-standard Marks¶

An opening may be identified as non-standard when its mark does not follow the expected Flow format for its category and phase.

Use Standardise when you want Flow to correct non-standard marks automatically.

➡️ Standardising Openings

Renumber Openings in a Specific Order¶

Use Guided Renumber when the required numbering order matters.

Rather than automatically correcting the existing marks, Guided Renumber lets you select openings from the Revit model in the order in which they should be numbered.

➡️ Guided Renumbering

Marks and Opening Views¶

Opening marks are also used by the opening-view workflows.

Window and curtain wall elevation names are based on their opening marks.

Door documentation uses a separate type-based view naming system.

Because of this, opening marks should normally be resolved before generating opening views.

Resolve marks before documentation

Standardise or renumber the project openings before generating opening views.

This reduces the need to rename or reconform views later.

Which Tool Should I Use?¶

Use Standardise when:

marks need to be brought into the standard Flow format
you do not need to manually control the complete numbering sequence
opening view names also need to be synchronised

Use Guided Renumber when:

the numbering order matters
you want to select openings directly from the model
you are working through the project level by level
you want to establish a deliberate W/Wx/D/Dx sequence