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 
.
