Point

Rest the pointer on a kind and the rows it would leave go quiet. Nothing has moved; it is only a look at what a choice would do, and it clears as soon as the pointer goes.

Choose

Choosing a kind is a small move inside one system. The kinds, the years and the rules keep their places, and only the entries swipe one column along: forward to the left, back to the right.

Reverse

Choose the kind you are already on and the order turns over. The arrow beside it turns with the rows, and each year finds its new place.

Fold

Into All, or out of it, the list opens and closes like an accordion. The entries that stay slide to their new places, and the others fold away or in.