w
  On the screen, this was set up using the

   [ T, T [   (under the SQRT (2nd button)
                and then the 5th entry - T is Lozenge [] char.

   This showed up (as i created it like this:

       a - p
     { b - p
       c - p

  with the "{" quite large and nice looking. But, i couldn't
  CLOSE the thing with a proper }  - it kept creating a NEW 
  sub level inside a place; eg,

    
       a - p
     { b - p
       c - p { _ }    where _ is the cursor ready for insert  - ARGGH!
{ a p
b p c p }