Well, thanks both of you, I am reading it, now if we want to make a picture field that the picture is changeable but the field is not delete-able, what should we do then? I uploaded sample.docx that has a text field and an image field, you can edit text fields and change the text but for picture you cannot do anything unless you enter password that is 1. How can we prevent the field of the picture from deleting but user can change the picture?
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