To access this dialog, go to Options > Project Preferences > Legacy.
The settings you make here are Project Preferences: specific to the Project you are working on and are saved with it. If another user opens the Project on his or her own computer, the same settings will be applied.
Line Types Displayed Across Stories
Select a line type with which to display the outlines of Slabs and Meshes that appear on stories above and below the Home Story, as well as certain Objects.
Note: This setting has no effect on Walls, Roofs or Shells, their Openings, or any elements in a Trace Reference.
Note: These line types are only effective on Objects if the Override Object’s Line Types checkbox in their Settings dialog boxes is on.
Use Symbolic Display in Floor Plan for Single-plane Roofs and their Skylights (as in ARCHICAD 14 and before)
Check this box if you want your Single-plane roofs and any Skylights within them to be displayed as they were in ARCHICAD 14 and earlier versions. Click the Info button at right for an illustration of the difference in displays.
•True 3D Projection: This display mode is available as of ARCHICAD 15. (All Multi-plane Roofs and newly placed Skylights will be shown this way.)
•Symbolic: This display mode corresponds to the way Roofs and Skylights were displayed in ARCHICAD 14 and earlier.
(For more information, click the Info button at the right of this option.)
See also Migrating Roofs and Skylights.
Use legacy intersection and Surface methods for model elements (as in ARCHICAD 16 and before)
With Legacy Mode ON:
•Automatic and Building Material priority-based intersections will not take effect in 3D. Connection methods used in ARCHICAD 16 and earlier versions will be used. You may prefer this when working on an older project, to ensure that your existing intersections remain intact.
See also Priority-Based Element Intersections in the Migration Guide.
•The Building Material attribute is available – but the priority-based connections will not take effect in 3D (except for Walls, where they will work as in ARCHICAD 16 and earlier versions). Use the slider below to set a global priority for Columns that intersect Beams.
•Surfaces assigned to Building Materials are not displayed. Only element-level surfaces can be shown.
•Surface Painter is not available
•Surface Schedules are not available
•Expanded geometry features for Beams and Columns (introduced in ARCHICAD 23) are NOT available. These include multi-segment, end cuts, tapered and vertically curved geometry. If you are in legacy mode, and if you try to use an unsupported geometry method, the resulting element is shown with a highlight. (See Use uniform color to highlight inverted elements.)
•Openings (created with the Opening tool, introduced in ARCHICAD 23) are displayed with 2D symbols only. Their 3D geometry is not displayed at all.
For specifics on how this checkbox affects the different construction elements in Legacy Mode, click the Info button in the dialog box.
With Legacy mode OFF:
•Existing, modeled connections that do not involve collision will not clean up automatically.
•Newly placed elements whose collisions are modeled using the new modeling methods described above will clean up according to the new logic. This way, even when you migrate an older-version project, you will be able to enjoy the benefits of the new intersections features, while maintaining the existing model as it was.
•Newly placed Beams, Columns and Openings use the full feature set available as of ARCHICAD 23.
Columns vs. Beams global priority (Legacy mode)
Available if Legacy mode is ON.
This slider defines the relationship between all Columns and Beams in the project. When Beams cross Columns, the element of lower priority will be cut in 3D, i.e., the intersection part will be removed. The element of higher priority will remain intact. This applies to volume calculations as well.
Note: Column priority numbers are always even and can only be defined as a general setting, in this dialog box. Beam Priority is set for each beam separately in Beam Tool Settings (Model panel - Legacy intersection mode only!).