How to control the output fields in ALV

Hi Pals,

I have a Z program which outputs around 400 characters length. It is working fine when we run in foreground(online).. But i have the problem with the length of the output of the report when i run in BACKGROUND mode. That is, only 255 characters are being displayed.

So, i have decided to supress some of the unwanted output fields being diplayed, so that the total output length becomes 255 characters.

How can i handle this situation in the ALV's?

Someone please send me some sample code.

Thanks in advance,

Ram.