What do you mean by "stack copies" in brother

Sorting copies using the ADF

You can sort multiple copies. Pages will be

stacked in the order (1, 2, 3), (1, 2, 3)

and so on.

1 Press (Copy) to illuminate it in

green.

2 Load your document.

3 Use the dial pad to enter the number of

copies you want (up to 99).

4 Press Options and ? or ? to select

Stack/Sort.

Press Menu/Set.

5 Press ? or ? to select Sort.

Press Menu/Set.
6 Press Start.

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

When you make copies they come out in the tray in sets, page one, page two, etc. When the group you chose number wise is done, the paper in the exit are moves over and repeats the next sequence on page one, page two, etc.