Master detail --> form - grid border

i have a form (master) and a grid (detail).
how to reduce top space above the grid inside the DETAIL window?
PLZ see snapshot
regards, mr.shah, india,

I think… in your datail set margin top to Zero “0”.

thanks, slightly top grey space was reduced when i did 0 in grid top margin (it was blank).
but still almost same gap remains on top of detail-grid.!
i wonder if any other way…
grid-detail-gap-|690x481