Hi Lynch,
You will need to create a New Line between your values. The New Line character may depend on the field. If this is a Text area field (such as Description or Notes) then it is of HTML type and then your New Line is: <br>
So: Apples<br>Oranges<br>Kiwi<br>Grapes
If your field is a String type which is a mere text then your New Line value shall be: \n so:
Apples\nOranges\nKiwi\nGrapes
(and if that doesn't work then try double-slash as: Apples\\nOranges\\nKiwi\\nGrapes).
Please let us know if helped.
Sagi