Hello Shivaraj,
First I created a transaction with transaction type "Program and screen (dialog transaction)" and I too faced the same problem.
After changing the transaction type to "Program and selection screen (report transaction)", I got the description of the tabs.
Follow the steps below:
1) Created a dialog transaction.
2) Save it and execute, you will get below message, press on YES and proceed, the output will not have description in tabs as you faced.
3) Goto edit--> Change transaction type (Shift+F1) and change it to Report transaction.
4) Now save the transaction and execute it, you will get description as shown below.
Regards,
Thanga