Select this mode to hide, but not delete, a portion of the object’s boundary.
To hide or show the edge of a 2D polyline or polygon:
1. Select the polyline or polygon to change.
2. Click the Reshape tool from the Basic palette.
3. Click the Hide or Show Edges mode from the Tool bar.
4. Click a vertex near the edge to be hidden.
Click again to show the hidden edge.
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