Buying or selling stock after market

How can I place orders to buy or sell shares after market close in Zerodha at post market session in nse till 4:00 pm.

The exchange allows Post-market orders are permitted only for equity segment.

The post-market session is open from 3:40 PM to 4:00 PM.

During this session, you can place buy/sell orders in equity (delivery segment using the CNC product code) at the market price but do note that even if you place a market order, it will be placed on the exchange at the closing price.

That means trades can only be taken place at closing price if both buyers and sellers agree at that price.