Ducati XDIAVEL Owner's Manual page 276

The stiffest damping setting is obtained with the
adjuster turned fully clockwise to the "0" position. By
turning counter clockwise starting from this position,
count the clicks that will correspond to positions "1",
"2" etc.
STANDARD settings are as follows:
- compression: 2 turns from max. (fully closed);
- rebound: 2 turns from max. (fully closed);
- Spring preload: 5 turns from min. (fully
uncompressed).
275