Deleting Whiteboard Content
The Delete Tool allows you to delete lines, shapes, and text that you have drawn or entered on the whiteboard. To delete an item on the whiteboard, click the Delete Tool 
, and then click the item you want to delete. Small squares, or handles, appear around the item before you delete it.
You can also use the Delete Tool to delete everything you have created on the whiteboard. (If you are working with an attached file, the file is not deleted.) To delete everything on the whiteboard, click the Delete Tool and then press CTRL and click anywhere on the whiteboard.