[OS X TeX] [TeXShop] input file and master doc compilation

[Sylvain CHAMBON]

howdy (again) !

i have a document (book class) in which i input files for each chapter  
in order to work only on the chapter in process. this chapter file is  
not indeed a tex document, just a piece of text.

now imagine i have in the master document the line '\input{./chapitres/ 
3e-trigo}' among other things and i'm working on this file '3e-trigo'.  
is there a way to compile this file _without_ opening the master  
document ? in fact, i have actually to do backwards and forwards all  
the time between the master document and the file of the chapter to  
see the result of what i'm writing... which it's quite boring !!!

hope i'm clear anouth. thanks for answers.

sylvain.