If you're looking for Richard's solution try this:
Create a field
- put a field on your form,
- go to field properties
- make the field computed for display
- check "Allow multiple values" in the first tab,
- then go the the 3rd tab and select in the field "Display separate values with" the value "New Line"
@Formula Put in the value property of the text field:
@Subset($Revisions; 4)
this will give you the first 4 entries. If you want to get the last 4 entries, put a minus before the number:
@Subset($Revisions; -4)
Is this what you wanted??