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[Miatpi]

Because in the box 1 and 2 you setup the speed mm/s....
and with the slider you setup the balance between precise and fast

Ahhhh... so it's two different speed you set in the boxes? One "fast speed" and an unrelated "precision speed" (may sounds wierd but I hope you get what I mean).

[Hugues]

In box 1 "Speed" you setup the maximum speed in mm/s and in the "precise" box ( 2) a slower one for a better print quality.

[Miatpi]

Yeeeey I get it now!!! Thaaaanks!!!
But if I would print a very object, on a half centimeter (0.2 inches), which setings do you recomand?

[Hugues]

depend of the layer thickness, but something like 22 (all speed) in the precision tab with a prime pillar (support tab)