Any object or node can be deleted.
•Select the layer the object is on.
•Click on the object you want to edit to make active (border is highlighted) 
•Click on the Edit Drawing button 
. The node/s of that object will become active.
•To delete the entire object, click on the Delete Object button 
or press the delete key on the keyboard.
•To delete nodes from a Line or Polygon, click on the node once and the node will turn from green to red denoting the node is now active. Click on the node a second time to delete it.
•To delete all objects off the layer, click the Delete all Objects button on the Layer Manager toolbar 
•To delete a layer, select the layer and click the Delete Layer button on the Layer Manager toolbar 
