shifting whole measure rest

[David Bobroff]

I want to shift a full measure rest downwards below the staff.  This is 
to keep it from overlapping cue notes in the staff.  I *can* use 
#'extra-offset to move it but it doesn't have a ledger line above it to 
indicate that it is a "whole" rest.  It's just a floating box.  How can 
I get a centered whole measure rest below the staff?

-David