To Delete or Erase a Model Note
Deleting a note removes the note entirely. Erasing a note removes the note from the screen, but the note still exists. Therefore, it is visible as a sub-level to its parents in the Model Tree, and is available for selection and other operations.
1. Select the notes you want to delete or erase on the Model Tree or in the graphics window.
2. Right-click and then click Delete or Erase respectively on the shortcut menu.