rehearsal mark question

[Seng Liang]

Hi, I am using Lilypond 2.7.12 on Windows 98.
As stated in the manual, rehearsal marks only appear above a staff. While this 
is true for most rehearsal marks, there are some exceptions. The most notable 
one being "attacca". The "attacca" mark appears below a staff for every part, 
but only appears once in a full score below the bottom most staff. Therefore I 
would think this is a rehearsal mark and not a markup text. This creates a 
unique problem. While I can use the \override command to move the "attacca" 
mark below a staff for every staff, when combining them into a full score 
however, the "attacca" mark appears below the top most staff and not the bottom 
most. Is there a way to fix this?
Thank you very much.
Yours sincerely,
Seng Liang.