ALV question

I have an simple ALV list of many fields. (I am using resue alv list display function module for this). I have to keep dragging cursor to the right to see all fields.

On the output, I want say fields 'A', 'B', 'C', 'D' always appear on the output even if I drag the cursor. I mean even if I drag the cursor to the right to see the other fields, these fields A ,B,C, D should still appear stationary on the output where as the other fields should be moving when I drag right.

Can you tell me what to do for the above requirement?

Thanks,

Krishen