When drawing a new polyline, in order to use a portions of existing polylines, my options are:
1. Continue drawing the new polyline and snap to the endpoints on the existing polylines.
2. Copy the existing polylines, trim , and join to the new polyline.
Either option can be time consuming when there are a lot of existing polylines.
My main reason for doing this is to create closed polylines and get areas. When the areas are adjacent to each other the closed polylines are coincident over many points.
Any suggestions appreciated.
Bill