To Erase or Unerase a Drawing Item on the Drawing Tree
1. Select one or more drawing items on the Drawing Tree.
2. Right-click. The shortcut menu appears.
3. Click Erase. The icon that represents the selected drawing item or items on the Drawing Tree appears grayed out, indicating the erased state of the item.
To unerase items, select the erased items, right-click, and click Unerase on the shortcut menu.