Ducati 996SPS Owner's Manual page 26

STANDARD factory setting is as follows:
compression: 10 clicks;
rebound: 12 clicks.
Max. setting for softest damping adjustment is 24 clicks
for rebound and 28 clicks for compression.
To change the preload of the spring inside each fork leg,
turn the hex. adjusting nut (2) with a 22-mm (0.87-in.)
hexagon wrench.
Preload setting range (A, fig. 17.1) is from 0 to 18.5
E
mm/0 to 0.73 in.
Factory setting is 10 mm/ 0.39 in.
Important
Adjust both fork legs to same settings.
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