new financial period

[Hélène PETIT]

Hi !

I am in France, and I am using GnuCash to manage the accounting of a 
small non-profit organization.
I am satisfied, even if the translation into french is rather weird.

As a new financial period has occured, and as I "closed book" using the 
dedicated tool, I don't want to see the old 2015 transactions when 
looking at income or expense accounts.

Have I to modify the filter for each related account, one by one, or did 
I miss an existing command doing this on a collection of accounts on 
one shot ?

Thanks !
Hélène