The down direction key: 1. (One check in the box selects all four direction keys)

The left direction key: 2. (One check in the box selects all four direction keys)

The right direction key: 3. (One check in the box selects all four direction keys)

The up direction key: 4. (One check in the box selects all four direction keys)

Das heißt:

Unten 1
Links 2
Rechts 3
Oben 4