Want to copy text from a dropdown to a field, but not ReadOnly

Hi all,

I'm currently using a simple calculation to copy text from a dropdown entry to a field in the same form.

import System

static def GetAttributeValue(Request):

    Value = Request.Company.Title

    return Value

This copies, but for some reason it makes the field ReadOnly. I'd like it to copy, but make the field available to input more text. The point of this being, that the field needs the original fields value as a prefix, but the user must enter the additional data.

Can someone help?

Thank you.