How to modify half quantity of Bracket order ?

[RAJENDRA_SINGH1]

I want to modify half quantity of stock.
Lets i have 300 stocks of 500 rupees, and in intraday when stock price become 510 i want to sell 200 stocks at 510 but all stocks are in bracket order.
So how to sell 200 stocks and carry my remaining 100 stocks in Zerodha BO.
Thanks

[chandru.vks]

@RAJENDRA_SINGH1

So how to sell 200 stocks and carry my remaining 100 stocks in Zerodha BO.

This wont be possible when using BO.