How to place limit order while closing the position in fyers web?Closing the positions in fyers web only allows us to close the order at the market price

Use the Limit order placing feature on the price ladder window instead.

https://fyers.in/price-ladder-trading/213

"Close position"  shortcut key is meant to close the open positions immediately at the available "market price". So using a limit order type for the "Close position" feature is only going to make things more complicated.

I did not find such an option in fyers web. It's very inconvenient. 

It is possible in fyers mobile app.