Hi,
The change of match style from "Operation" to "Signature" and vice versa can be done from VSI of a VS. As we can open the VSI in the workstation, there is an option to do from there. Since thats not the case in Portal, you can make this change by opening the VSI in any test editor like Notepad/Notepad++ etc and change the match style of any transaction.
Here is a sample of a transaction whose match style I changed from Signature to Operation
Changed line
<rq id="16" op="deleteUser" tl="SIGNATURE">
To
<rq id="16" op="deleteUser" tl="OPERATION">
Where I have changed the Match Style of deleteUser operation from Signature to Operation.
Regards
Neelima K