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If you have made a mistake and deleted something from your course that you didn't intend to, restore items by completing the following steps:
Undelete item(s)
1. Within the course you deleted from, go to the webpage URL and type "/undelete" at the end and press the enter button on your keyboard.
2. Anything that has been deleted from the course can be restored by clicking the "Restore" button next to the item.
3. You will be prompted to confirm your selection. Click "Okay".
The item will be added back to your course. You can restore another item immediately. Do so by following steps 2 and 3 again.