Option

Eliminates the confirmation box from Empty Trash and Secure Empty Trash

Shift--Delete

Empties the Trash

Shift--Delete

Puts back a highlighted icon in the Trash

Shift-Option--Delete

Empties the Trash without confirmation box

Option-Empty Trash

Empties the Trash without confirmation box

-comma

Opens Preferences

-H

Hide this program

Shift--H

Hide other programs