Lot size partially close kar sakty hay?

bohat say traders ko ye maloom nahi hay keh agar hum nay maslan .10 lot use karty huway koi order place kea huwa hay to hum agar hum order main say .05 ki lot ko close karna chahty hay to wo hum kar sakty hay eskay liye humay order ko modify karna hota hay aur modify main ja kar wahan par jitni lot size close karni hoti hay wo likh kar modify kar daina hota hy then jitni lot hum nay likhi hoti hay wo close ho jati hay