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Valjak
Uključi alatku "Rotiraj grafički prikaz" u gornjem levom uglu. Tako možeš da "uhvatiš" mišem 3D prikaz, okrećeš i posmatraš sa svih strana.
Takođe možeš pomerati žutu tačku i time menjati visinu valjka (prethodno izaberi alatku za pomeranje).