Align Openings
Sometimes an opening does not sit flush with a wall edge, floor surface, or another element. The Align feature lets you snap an opening to a selected reference element with one click, so it fits neatly into its surroundings.
Align works with walls, beams, floors, lines, and other element types. It supports linked elements and can be used in both 2D and 3D views.
Video Tutorial
Align Openings with Selected Elements

- Go to the conclass tab and click [Align].
- In the dialog, choose whether the total dimension of the opening should be rounded after aligning (see Round the Total Dimension) and confirm with [OK].
- Select an opening.
- Select a reference element (e.g. a floor surface or wall edge) to which you want to align the opening.
- To align more openings, select the next opening followed by its reference element.
- Repeat as many times as needed.
- Press [ESC] to exit the Align tool.
Round the Total Dimension
Aligning moves one edge of the opening onto the reference. As a result, the total dimension of the opening (Total Width, Total Height or Total Length) often ends up as an odd value, such as 1,237 mm instead of 1,250 mm.
To avoid this, Align can round the total dimension for you. When you start the tool, a dialog lets you choose the rounding:
| Option | Result |
|---|---|
| No rounding | The opening is aligned only. The total dimension is left as it is. |
| To the nearest 1 mm … 50 mm | The total dimension is rounded up to the next multiple of the selected increment. |
| To the nearest 1/32" … 1" | The same, using inch increments. |
How rounding works
- The aligned edge stays exactly on the reference. The opening never moves off the reference you picked.
- The oversize on the opposite side of the same axis is increased so that the total dimension becomes a round value. For example, if you align the left edge, Oversize Right is adjusted so that Total Width is rounded.
- Rounding is always up. The opening never gets smaller than the aligned result.
- If both edges of an axis are aligned (e.g. left and right), that axis is not rounded, because both edges are fixed by references.
- For circular openings, the radius is not rounded. Only the length (horizontal openings) or the top and bottom oversize (vertical openings) is rounded.
The rounding dialog is only a quick selection. The oversize values are regular opening parameters, so you can still adjust them manually afterwards.
Don't ask again
If you always work with the same rounding, tick Don't ask again in the dialog. Align then starts picking immediately with the stored rounding.
To change the rounding later, hold [SHIFT] while clicking [Align]. The dialog opens again and you can pick a new option or untick Don't ask again.