Hi @pradeep.kotegar,
Welcome to the DocuSign Community!
We are glad to have you here and can't wait to help share as much knowledge as possible.
I understand that you are looking to set your document custom field as read only, and I will share more details on the topic.
In this case you would want to manage this behavior within the document custom field properties in eSignature>Settings>Document Custom Fields, by enabling the Read Only option in your custom field.
This will keep the field locked for the recipient, while allowing the sender to still pick an option during the envelope creation process.
For more details on how to manage your custom fields, see:
Edit Custom Fields from Documents
Feel free to let us know if you need further assistance with this.
Thank you for using DocuSign, we hope you have a wonderful rest of your day!
Best regards,
Alejandro R. | DocuSign Community Moderator
Please click "Best Answer" below if you find my reply to be a valid solution to your issue!