[Koha] Mapping fields to "ignore"

[Gianmarco Spiga]

Hi all, 
We are doing some tests to see if Koha is the right choice for our small social
justice library. 
Does any of you know if there is a quick way to set all the MARC
fields/subfields to "ignore" in the MARC structure for a given framework? I
would like to do that and then map only the fields that we are going to use.

Thanks!
Gianmarco S.
SFPIRG Social Justice Library