How to set up SLA for any user transaction at PC?

Hi!

I use PC 12.53.

I tried to set up a new SLA. The measurenent was "Transaction Response Time (Percentile)". Under "Transaction" tab, SLA wizzard shows only vuser_init_Transaction, Action_Trasnsaction and vuser_end_Transactions. How do I "register" my transactions in order to be able to set up SLAs?

I have tens of transactions at "Action" file and I don't want to split my "Action" file to tens "Action1", "Action2" etc files to include only one transaction at each file.

Thanks in advance.