I suggest not disabling data entry. Instead, define a field of type calculation that copies the value of the text field and placing it on your layout. Since it is of type calculation, users will be unable to edit the field, but can select and copy/paste from it.
Thanks, Phil. Much obliged. I'll see how this works with a couple of fields. Although, I have to admit that it would seem to create a lot of duplication if I wanted to apply it to many fields.