Activity › Forums › Salesforce® Discussions › How to use trigger to make read only field in Salesforce? Salesforce® Discussions How to use trigger to make read only field in Salesforce? Posted by Deepak on September 16, 2020 at 3:13 PM How to use trigger to make read only field in Salesforce? Deepak replied 5 years, 8 months ago 1 Member · 0 Replies 0 Replies Log In to reply. Public All Members My Connections Only Me PublicAll MembersMy ConnectionsOnly Me Public All Members My Connections Only Me