How to set readonly Sharepoint Field for column Multiple lines of text and Single line of text?

Hi Plumsail,
How to set readonly Sharepoint Field for column Multiple lines of text and Single line of text ?
I used Plumsail form and set readonly on form Edit for column Multiple lines of text and Single line of text but it not work
My code: fd.field(‘Title’).readonly;
Please help me

Thanks

Hi!

Try this code for both cases:

fd.field('FieldInternalName').disabled = true;