Hello Satish,
I'm afraid you can not do that. because the rows for a tab page will be fixed in standard. One thing you can do is you can rearrange/distribute the existing screen areas to other tab pages and accommodate your custom screen areas within these Five standard slots. I hope you are aware of how to go about custom screen areas and custom fields. In this regard you may like to refer to this document: User-Fields in QM and PM/CS Notifications : Screen exit QQMA0001
Regards
KJogeswaraRao