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- Tangency limit angle: This criteria select the lines between surfaces in which angles between normals in the surfaces are lower than the value.
- Take care layers: If this is set, lines between surfaces which are in different layers won't be selected.
- Take care curvatures: This ratio means the diference difference between curvatures in the surfaces that share a line. If the ratio between the curvatures exceeds this value, the shared line is not considered to be selected. As an example, if this value is 0.1 (10%), the only lines which will be selected will be the ones in which the two surfaces that share the line have almost the same curvature (only a 10% of difference is accepted ). As this number increases, probably more lines will be selected.
- Lines of surfaces smaller than: All the lines of surfaces which have some line smaller than this value will be selected.
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- By clicking Select by criteria all the selected criteria are used to select the lines.
- Modify selection allows the user to modify manually the selection made.
- When Apply is clicked the marked option (Skip, No skip or Automatic skip) is aplied applied to the selected lines.