Delete Tool: Depressing the Delete button allows you to remove an object in the simulation window by clicking on it. You can also click-and-drag out a box to delete several objects at once.

Warning: You may find it easy to forget , after you delete an object, that you must click another button (particularly Select) to execute other actions, such as moving an object or opening its Properties Box. If you try to move an object with the Delete tool, your object will disappear!

Fortunately, if you happen to accidentally delete an object, there is an easy fix: Type control-Z to undo the accidental deletion. Consult Keyboard Commands for more information.