Zanussi DI 720 Instructions For The Use And Care page 17

Raising and Lowering the Top Basket
If you have plates over 27 cm (10.6 ins)
diameter and up to 31 em (12.2 ins) the top
basket must be raised to a higher position
to accomodate them. The large plates can
then be stacked in the lower basket. To do
this take the front runner stops off the
top basket (see fig. 12) and remove the
basket. Then take off the rear runner
stops, pull out the slides and refit them in
a higher position (see fig. 13).
Replace the rear runners stops, then the
basket and finally the front runner stops.
Note
When the top basket is in the higher
position, it will only take plates up to
19 em (7.5 ins) diameter and you will not
be able to use the raised cup section.