A Diagonal Box is a 2 x 2 which is offset by two positions.
Diagonal Box Formation:
  or  


From a 2 x 4 there are two Diagonal Boxes.
Work in the Distorted 2 x 2 illustrated below.
Use Stars for the traffic pattern when appropriate.
 Work with these dancers in a Diagonal Box. 

 
 before Diagonal Box Counter Rotate 1/4   after


Notes:

For historical reasons the word 'Box' is often omitted (e.g., 'Diagonal
Scoot Back' means 'Diagonal Box Scoot Back'; 'Diagonal Circulate' means
'Diagonal Box Circulate').

Diagonal Coordinate  Motivate  Percolate  Perk Up  etc.
means to replace the first Circulate of the call with a Diagonal Box Circulate.
It doesn't mean to do the entire call within your Diagonal Box! Nowadays, callers
can be more explicit by saying something like
Initially Diagonal Box Motivate.
Diagonal Boxes can show up in formations other than a 2 x 4:
 
 (Sometimes called Twin Parallelogram)   (Also known as Parallelogram Split) 

See also Diagonal Column  Line  Wave CONCEPT [C4].