By move do you mean just change the position of a figure in the scene?
Go to the pull down menus at the top and click Window/Parameter Dials
(or Shift+Ctrl+N) This brings up a pop-up parameters window.  Then click on
the numbers in the Xtran, Ytran, and Ztran rows and enter numbers to move
your figure left/right, up/down, forward/back.
To delete a figure just click on that figure and then hit the Delete key on your
keyboard.