I thought I would have some experienced advice for a work around I have come up with to see if there might be a better option available.
My issue was to transfer field text from a calculation field to a second field so I could then amend the text directly within the second field, as the text within the first (calculation) field cannot be directly altered. I added a button to the layout under the second field and placed an action to Relookup field Contents (specifying the field to the ID field) and checked for no dialog box appear. So in effect it works as a copy and paste from the first the second field with the latter field text directly being amendable.
So it works fine but I thought I would ask if there are better methods available?