Permissoin in elastix for just add new extenssions

hello all ;
I want to have username to login in elastix and only see extesions tab of PBX .
I am ok when adding "PBX configuration " to group permission but this grant any pbx configuration permission to group permissions , I need only add extensions permissions .
can anyone help me

thanx before
best regards.

This is less an Asterisk question and more an Elastix question. This may not be a good forum for your question.