When 2D auto-constraints are enabled, certain geometric constraints are automatically created when adding lines. You can disable 2D auto-constraints when the drawing window is active. In that case, no constraints will be added to the drawing automatically during line drawing operations.
You can toggle the 2D auto-constraints setting on or off as follows:
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Select Settings > Drawings, Models
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Open the Usage tab
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Check or uncheck 2D Auto-Constraints
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Confirm with the OK button
The setting will remain the same even after restarting the software.
When the setting is enabled, the following constraints are created automatically:
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If you add a line parallel to another line using the E key or the parallel ruler, a parallel constraint is automatically created.
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If you add a line perpendicular to another line using the T key, a perpendicular constraint is automatically created.
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When adding a line using the tangent ruler with point-arc or arc-arc settings, a tangent constraint is automatically created.
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With the parallel ruler (distance), a distance constraint is created.
Note:
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This setting is available only when the 2D constraint solver is enabled.
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The setting does not affect geometric constraints used to link parts of a parametric building model (such as walls, windows, doors, roofs, etc.).
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Elements that already contain geometric constraints will retain them even if the 2D auto-constraints setting is turned off during the design process. However, new elements added afterwards will not automatically receive constraints.
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You can remove an automatically added constraint from a line by selecting the line and choosing Properties from the context-sensitive menu.