Field types
Template field
A field with a display that the administration has built specially: an inventory number in large type, a link into another system, a coloured area that follows from a status. Underneath there is an ordinary value, a text or a number.

Input
That depends on the display. If it contains a text box or a selection, a change there saves the value as in any other field. If it contains neither, the field is display only. The annotations (comment, source, colour, uncertain) are available as with every field.
One example from the demo collection is the field Wahl (choice) in the layout Erfassung (data entry).
Instead of a number it shows a choice of the levels 1 to 3 with Löschen (delete). If the value is empty,
the display shows only its framework; for the field Nummernschild (number plate), for example, the
character #.
If the field shows an error message instead of its display, the error lies in the display, not in your data. Ask the administration for help.
Display and export
The custom display exists only in the layout (input form). Search, filter, sorting, Excel export and Word templates see the raw value, that is the text or number underneath.