Determine Cabinet Opening - Whirlpool WDF320PADB Instructions D'installation

Your dishwasher has leveling legs. The following provides
instructions to adjust the leveling legs to set the dishwasher to the
correct height for your cabinet opening.
Measure height of cabinet opening from underside of countertop
to floor where dishwasher will be installed (you will need to
measure the lowest point on the underside of the countertop and
the highest point on the floor). Refer to "Dishwasher Height
Adjustment Chart" to adjust the leveling legs.
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Determine Cabinet Opening

NOTE: If the minimum cabinet opening height is less than
33⁷⁄₈" (86 cm), the rear leveling legs and spacers can be removed
for additional clearance. This will allow the dishwasher to fit into a
33¹⁄₂" (85.1 cm) high cabinet opening, but the dishwasher will be
more difficult to move. (Measurements are approximate. Rear and
front leveling legs are preset at the factory for 34¹⁄₂" [87.6 cm].)
Turn front and rear leveling legs to the same height. Refer to
"Dishwasher Height Adjustment Chart."