How to change the php ini level?

Hello,

i want to change the php ini level for fcgi in imscp 1.1.5.
No it is "per site" and i want it to "per domain".

How do I change it without reinstall the imscp?

best regards
Levitas

omg..
So easy?

Thank you very much for the fast and clearly answer.

best regards
Levitas