Change the text contained in GUI TITLE

Hello all,

I have a query about GUI TITLES

In the following code,

SET PF-STATUS 'MAIN_6' EXCLUDING fctab.

lf_tbar = 'MAIN_6'.

SET TITLEBAR lf_tbar.

I want to edit the text contained in the field 'MAIN_6'.In the program using this,when i click on the "display object list", i am able to see "MAIN_6" under the GUI TITLE submenu and also the current value in it which i want to change.Can you please tell me how i can change the text content.What is the transaction for changing the gui title?

Thanks and regards,

Deepthi