You can now see the 20% margin blocked from the sale of your holdings in the Delivery Margin section on both Kite Web and Kite Mobile. For more information, you can refer to this post.
Assume you have sold 50 shares of ZEEL at Rs 211.15. The value of holdings sold is Rs 10557.50 i.e. 50 x 211.15 (ignoring charges).
Out of the Rs 10557.50, 80% credit (i.e. Rs. 8446) is available as a negative balance under the used margin field. You can use this negative used margin for other trades. The balance 20% credit (i.e. Rs. 2111.50) is blocked under the delivery margin field as shown below:
