E.g. with wandering sixths the division of the hand is symbolized by two numbers above each other separated by a line; and until the next position you continue with two-finger-positions (one may have even three…).
With this way of writing you save nearly half of the numbers of a conventional fingering as it is often seen, and you recognize at once where the hand goes.
The dividedposition can also appear one part after another: This will be made clear with a longer line:
If one part of a divided position finishes and the hand continues to play in the other part, the separation line will edge down or up to the finishing side: