Re: [O] Changing packages and their order in LaTeX export

[Dror Atariah]

>> I need to include 'amsmath' package in my LaTeX export. Using
>> #+LATEX_HEADER: \usepackage{xyz} adds it at the end of the list, and
>> then there are LaTeX related problems.
>> I tried to find where the default list is defined - it seems like it
>> is in org.el. However, I have several copies of this file, and I don't
>> know which one is the right one to change.
> 
> Does M-x customize-group RET org-export-latex RET show something that
> could be of interest to you.
This worked for me! Where did you find it in the manual? I looked there. 
Sometimes the manual's instructions are too cryptic for me - in the sense that 
I find the variable name, but I don't know how to change it.
> 
> As a user, in principle, you should refuse to look at elisp files. But
> it's a very good idea to look at the manuals though.
Thanks for the tip!

>> 2. If it is the org.el, then how can I tell which file is the one
>> which is used? Should I restart emacs after each edit of this file for
>> the changes to take effect?
Can you still answer this question? How can I ask emacs to tell me where is the 
file it is using and should I restart after each such change?

Thanks,
Dror