latex options

[Zhihao Ding <zhihao.ding@imm.ox.ac.uk>]

Dear Org experts, 

I was wondering if anyone could advise on this simple problem.
My toy org file, shown as below, contains 3 projects. I’d like to  
export beamer PDFs for individual projects from time to time, 
but the pain is that I always need to modify the header options  
(title, select_tags etc) to match the project that I want to export. 

The question is what the best way is to organise the options for 
multiple projects? Ideally I’d like to put a copy of the options 
under each project, so that I only need to define them once. 
It’d be even better if I could specify the file that I want the project
to be exported to instead of the same pdf file matching my org
file.

#+TITLE: mytitle
#+AUTHOR: myself
#+DATE: \today
#+LaTeX_CLASS: mybeamer
#+SELECT_TAGS: export
#+EXCLUDE_TAGS: noexport
#+OPTIONS: H:4 toc:nil *:

** project 1
** project 2
** project 3

Thanks a lot!

Zhihao