From FreeCAD Documentation
Option
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Description
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Filter
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If the Filter checkbox is checked the Filter dropdown list controls which constraints are listed:
- All: All constraints.
- Geometric: Geometric constraints.
- Datums: Driving dimensional constraints. Does not work properly: all dimensional constraints are filtered.
- Named: Named constraints. Does not work.
- Reference: Driven dimensional constraints. Does not work.
- Selected constraints: Constraints selected in the sketch.
- Associated constraints: Constraints associated with elements selected in the sketch.
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This button toggles the visibility of the listed constraints in the sketch.
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This button opens a menu:
- Auto constraints: If checked, some geometric constraints are applied automatically to new elements.
- Auto remove redundants: If checked, new constraints that are redundant are automatically removed.
- Show only filtered Constraints: If checked, only the listed constraints are shown in the sketch.
- Extended information (in widget): If checked, extended information is added in this form:
[(GeoID1,PosID1),(GeoID2,PosID2),(GeoID3,PosID3)]
- GeoID is a zero-based index for non-external geometry. The X axis has GeoID -1, the Y axis has GeoID -2. GeoID -3, -4 etc. are used for external geometry.
- PosID can have the following values:
- 0 = edge, 1 = start point, 2 = end point, 3 = center point.
- For example a dimension from the origin to the center of a circle that is the 2nd non-external element in the sketch will have this extended information:
[(-1,1),(1,3)]
- Hide internal alignment (in widget): If checked, constraints associated with internal alignments are hidden in the list. The Show/Hide internal geometry tool can also hide these constraints, but will also hide the internal alignments in the sketch.
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Context menu
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Right-clicking constraints selected in the list opens a context menu. The menu has the following options:
- Change value: Changes the value of a dimensional constraint. Only works for a single constraint. You can also double click the constraint in the list, or double click its value in the 3D view.
- Toggle to/from reference: See Sketcher ToggleDrivingConstraint.
- Deactivate or Activate: See Sketcher ToggleActiveConstraint.
- Show constraints: Same as checking the constraint checkbox. But, unlike the checkbox, also works for more than one constraint.
- Hide constraints: Same as unchecking the constraint checkbox. Idem.
- Select Elements: See Sketcher SelectElementsAssociatedWithConstraints.
- Rename: Renames the constraint.
- Center sketch: Centers the 3D view around the selected constraints.
- Delete: Deletes the selected constrains. The Del key can also be used.
- Swap constraint names: Swaps the names of selected constraints. Only works if two constraints with user given names are selected.
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