Can you Brief your requirment much more clear?
Do you want to use the sub sequence name during run time?
I assume that you want to call the subsequence. Correct?
If so, use the Sequence Call step and configure the subsequence as module.
If you want to rename the subsequence, select it in the sequence pane and press F2 (standard key in Windows for renaming things).
Yes, I want to acquire the subsequence name in run-time. I have a sequence file consists of one mainsequence and too much subsequences, so I want to acquire their names easily without manual operation.
What is the purpose of this? In case you want to have this for documentation purposes, there is the "Sequence File Documentation" tool (Tools) you can use.
You can aquire the subsequence name at run-time, from within the subsequence, by using the following expression:
Besides i fear that you create yourself unnecessary work (read: instead of modifying TS reporting creating a complete new one), you should have step storing "RunState.Sequence.Name". You then pick up this variable in your LV reporting code.