A selected (highlighted) individual object or group of objects can be removed from the model by invoking the "Delete Objects" menu command, from the Edit menu. Note: A link cannot exist without both end-nodes; thus when one end-node is removed, the link is also deleted. To delete a vertex from a polylink, hold down the <Shift> and <Ctrl> keys and click on the vertex to be deleted.

To delete a background picture:

  1. Click the Background Image Properties tool  from the Background Images Toolbar
  2. Select the background image you wish to delete. 
  3. Click the "Delete" button. Invoking the delete background tool at this point will immediately delete the background.
  4. Click "OK" to close the window.