Problem in pattern of main window in smartform

Hello Experts,

I have created a line type in mainwindow with 6 columns. I use a pattern with only vertical lines.Now when the values get filled in the main area of the window the pattern is getting extended only till the line items entered, it is not getting extended till end of window. Is there a possibility to extend the pattern till the end of window,even when the main window is not filled with enough values.

Thanks and regards,

Satish.