Report - Line Graph

[MH]

I'm just starting with Gnu Cash reporting.  What I'd like to have is a 
line graph that shows the account balance over time.  It would be really 
nice if it could be configured to show multiple accounts with separate 
overlying lines.


Is there a repository of reports that one can collect from and add?  The 
program shows custom reports and the manual/wiki talk a bit about it. 
I'm not a programmer, so I'm wondering where to start.  I tried to find 
the report files in the GnuCash folder and couldn't find them.  Are they 
actually in the program itself?

Marvin