How to make field read-only after changing the field value

Question

I want to change the object as read only whenever the picklist value becomes close. Can anyone help me how I can able to do that?

Answer 1

So basically, you can add a validation rule in it, so that it will throw an error if the value is close and someone wants to add or change the field value.

AND(ISCHANGED(Field__c),ISPICKVAL(Field__c,"Close"))

I hope this will help.

Want to become a Salesforce expert? join Salesforce certification now!!

Want to know more about Salesforce? Watch this video on Salesforce Admin Certification | Learn Salesforce: