Lee McDonnell shares a terrific routine that allows you to perform dynamic offsets in AutoCAD drawings. Using this routine, you can offset multiple objects at once and visually select the offset distance while viewing the results in real time. Lee has packaged the code and dialog box into a single VLX file, which can be loaded in the same way that you load other LISP routines. Start the command by entering DynOff, then select one or more objects. After the selection is complete, move the cursor to see the results. You can type S for a settings dialog box, press + or - to change the number of offsets, or type in an exact offset distance. This is another great example of using grread expressions, which read input devices such as the mouse and keyboard, to obtain user feedback.