Viavito Onyx Owner's Manual page 9

Step Four.
01 Fasten the saddle (4) to the saddle
post (16) using flat washer (29) and
nylon nut (30).
02 Insert the saddle post (16) into the
post of the main frame (1).
03 Adjust to the desired height and align
the hole on the saddle post (16) with
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the hole on the post of the main frame
(1) so that the pin of the seat-post
knob (15) clicks into the hole. Then
tighten the seat-post knob to secure.
Note: Partially unscrew the seat-post
knob (15) and pull backwards to adjust
the height of the saddle post (16).
Once the desired height is reached,
re-tighten seat-post knob to secure.
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