7. The Menus / 7.8 The Effects Menu
Twist is a layer distortion (see chapter 2.6). It roughens a text or vector layer by running stepwise along its outline and displacing the points in such a way that the effect of a twist is created.
Angle is the strength of the twist effect. If Twist Inside is turned on, the edges of the layer will be fix and the distortion will be higher towards the center. If Twist Outside is turned on, the center of the layer will be fix and the distortion will be higher towards the edges.