The Shear filter applies distortion according to customisable linear or curved graphs. Horizontal and/or vertical shearing is possible via separate graphs.
The graphs are set and modified in the filter dialog. They can apply linear shearing by moving end nodes in the graph only. Shearing to a curve is possible by reshaping the line.
This filter can be found in the Filters menu, in the Distort category.
The following settings can be adjusted in the filter dialog: