[Pharo-users] Rotating a String or Text Morph

Hi everyone! I'm trying to rotate a String or Text Morph. The way I'm doing this is evaluating: transform:= (TransformationMorph new asFlexOf: 'hola' asStringMorph) openInWorld . The string morph opens in the world and it looks OK. Now, I rotate it doing: transform angle: 80. And it rotates OK, but a black background appears and I don't know how to remove that, I can't find what's making that black background appear. Am I doing something wrong? Is there another way to rotate a string morph? Thank you! Carla