Panasonic Inventer NN-GD459W Manuel D'utilisation page 6

Dish size
Follow the dish sizes given in the recipes, as
these affect the cooking and reheating times. A
quantity of food spread in a bigger dish cooks
and reheats more quickly. Food cooks better
by microwave when in a round container
rather than square.
Density
Porous airy foods heat more quickly than
dense heavy foods.
Arranging
Individual foods e.g. chicken portions or
chops, should be placed on a dish so that the
thicker parts are to the outside.
En-4
General guidelines
Quantity
Small quantities cook faster than large
quantities, also small meals will reheat more
quickly than large portions.
Shape
Even shapes cook evenly. Whenever possible,
cut the vegetables and other foods in regular
pieces.
Spacing
Foods cook more quickly and evenly if spaced
apart. NEVER pile foods on top of each other.