Protect Conditional Field Record For Free

The only way to do this is with VisualForce. You will have to have code in your controller that determines if the field is an outputfield (read only) or an inputfield (read / write). Then you'll need to call a reRender on the fields on change the dropdown. This blog post may give you some help for this.

Salesforce Classic: Click on Setup | Manage Users | Permission Sets. Open the Permission Set that has the 'Edit Read-Only Fields' added in it. Go to System permission. Deselect the option 'Edit Read Only Fields' Save.

Conditional Visibility allows you to specify when you want a particular page component to be visible. We can use this to customise our pages to make information appear when it is relevant to the business process, and be hidden when not, so that we can keep the page as simple and concise for our users as possible.

Go to Setup ?> Process Automation Settings ?> Enable ?Enable record locking and unlocking in Apex? checkbox.

Using Record Type & Page Layouts: Create two different record types say ?Open? & ?Locked? and change the record type of the record using workflow field update or trigger. And then create a separate page layout for the ?Locked? record type with all fields marked as 'Read-Only'.

Setup ---> Customize ---> Objects ---> Page Layouts ---> Edit the page layout ---> Select the field you want to make read-only ---> Click on 'Properties' of the field(an icon to the right end of field) ---> Here you will get a checkbox to make the field read only.

To lock or unlock a record: In the footprint tab, select a footprint record. From the actions menu, select Lock. Note Users who don't have the Modify All access to the required objects can't see the Lock action in the actions menu.

?Hiding? Fields from Users or Profiles This time, from the Object Manager, click on ?Fields & Relationships?. Select the field you're looking to modify. Then, select ?View Field Accessibility?. From the drop down, select the field you're interested in hiding.

How to make field non-editable in Salesforce? Go to the page layout. Click the Field Properties in the page layout. Make it Read-Only.

3 Answer(s) Go to the object's field page under Setup. Click on the view link for the field. Click the Set Field-Level Security button. Change the field to read-only for the appropriate profiles (You would need to change to appropriate profile to test)