For each symbol representation to be created, perform the following steps:
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Sketch each representation on a separate layer. For more information, see Sketch and Constrain Profile Cross-Section Geometry.
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Shift-click to select the lines and arcs that define the contour of the profile. Do not select points, construction lines, dimensions, or constraints.
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Click Group on the Change toolbar.
The geometry for the group must be selected in order in a clockwise direction. As geometry is picked, the contour should always form a continuous curve. Good practice is to start at the origin point and go clockwise around the contour, ending on the origin point.
For more information, see Cross-Section Symbol Representations.
It is easier to select the geometry for each group by having only one layer at a time displayed. Click Layer Status and select Active Layer Only. You can then display each layer individually.