HI Abhijeet,
Increase the size of the mail window...It will then accomdate more then 1 line details in the same page.If space is not available in the Main window for the line items on the same page then it will automatically call the new page.
Decrease the size of other windows where ever possible.
PS:Try not to over lap any window...it creates unnecessary confusions in future.
REgards,
Vikas