Can I change the behavior of the Create Partner button by editing component in page composer?

Summary:

I want to change the behavior of the Create Partner button in PRM from requiring the ZPM_CREATE_PARTNER_PRIV privilege to requiring a custom role that we will assign to users we want to have the ability to create partners

Content (required):

I want to change the behavior of the Create Partner button in PRM from requiring the ZPM_CREATE_PARTNER_PRIV privilege to requiring a custom role that we will assign to users we want to have the ability to create partners.

Is the EL expression in the edit component of the button editable at all? If yes, how do I edit it?