Using topological editing to maintain connectivity

Features that are in classes that take part in a topology automatically maintain topological nodes, edges, and faces as their geometries are edited (faces are only maintained for a planar topology type.)

You can view the topology primitives data by selecting View Topology on the Status bar or Ctrl+t if you have a keyboard.

You cannot create or delete these nodes, edges, and faces; however, you can do the following:

• Nodes: Move them, which moves all edges that connect to them, and all associated features will move as well
• Edges: Move them or reshape them, which will update all associated features at the same time. This is particularly useful when editing a boundary that is shared by adjacent polygons.
• Faces: You cannot reshape faces (you reshape the edges instead), but you can select them so that you can use their geometry to create new features using  the Create from Selection operation. This is particularly useful for forming polygons that have been enclosed by lines, for example, to create a building from construction lines.