ANY text-item, when receive the focus in entrance, WILL be highlighted by default, IF you are navigating by keyboard. An option maybe can be : have a non-base table display item with the non-enterable part of the field, leaving just the enterable part in a normal non-base text-item, and behind the scenes (maybe in xx-COMMIT triggers) concat the fields in the non-visible original base-table text-item

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Chiappa