Load an image by drag-and-drop or paste and it becomes a pencil sketch. Tone is translated into overlapping diagonal hatching: the darker the area, the more layers cross at different angles. Outline and detail are drawn on top.
The Adjust panel has five entries: Outline, Shading, Hatch, Detail, and Texture. Pick one and its values appear in the panel beside it. Because tone is built from strokes, the hatch angle and spacing change the whole drawing. Save the finished image as a PNG.
Double-click a panel title to switch how the panels are laid out. In the movable layout you drag panels wherever you like and keep several open at once; in the fixed layout a single panel sits in the top right.