Note: How to Use the Arc Map Editor in InfoSWMM
Step 1 is to use the Edit Feature for example the Subcatchment layer to bring up the Arc Map Editor Tool.
Step 2 is to use the Reshape Feature tool or Vertex tools to bring together mis matched Subcatchment Boundaries
Step 3 is to use save the edits and then Update the DB from the Map to recalculate the area of the Subcatchments
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