Do you want to import these changes or enter them one at a time using the form?
If you want to import en masse such a change to a text field without overwriting what is currently there, you may need to use an intermediate formula text field, and, a new text field to import into.
Can you provide your desired approach to making the edits to this text field?
Let's say you have a field into which you import the additional text. Let's call it for now, [Additional Text]. << this is to be a normal, multi-line text field.
Let's create a formula text field, [Text field plus additional text]. << This is a 'formula text' field.
Inside the code for the formula text field, [Text field plus additional text], you will say,
[my current text field] & " any separator characters " & [Additional Text]
[My current text field] is whatever your current text field is whose "content" is to be appended to within your formula text field.
Your import spreadsheet would import only into [Additional Text]. Not any of the other two text fields.
You would create or modify existing reports using the formula text field, [Text field plus additional text]. In other words, your reports will use [Text field plus additional text].
Your current already in use text field would be for normal single record form input.
Does this make sense?
var originalClickHandler = $("#saveButton").data("events").click[0].handler;
$("#saveButton").unbind("click");
$("#saveButton").on("click", function() {
$("#_fid_6").val($("[name=_fid_oval_6]").val() + ", " + $("#_fid_6").val());
originalClickHandler();
});There is no need to use formulas or a child table. The behavior you want should be implemented directly on the form when the keystrokes are entered and the form is Saved.
