How do I unpledge shares?
You will see the list of shares you have pledged on https://console.zerodha.com/portfolio/holdings
Hover your cursor on the stock and click on 'Options' and the 'Unpledge'
Enter the quantity you want to unpledge and click on Submit.
If you have placed an unpledge request before 2 pm, the stocks will be available in the DEMAT account for trading on the next day, and if you have placed a request after 2 pm. The stocks will be available in DEMAT for trading the day after.