Approver to change the BD invitation

hi,

We are running on SRM 5.3(SP6).We are using the N-step WF for BID Invitation i.e. WS14500028.

I wanted to know if the approver for the BID invitation wants to change the BID invitation,how will he do it?Do we have a CHANGE button on the screen for changing the BID invitation?If so,do i need to change any parameter in the PERSONALIZATION tab of the role of the approver as we in case of SC approval?

BR,

Disha.