- Drag an image onto the canvas to use as a reference.
- Shift-click on the canvas to place a vertex.
- Click and drag a vertex to move it.
- Click and drag a midpoint to add a vertex there.
- Polygons are smoothed by default. Click a vertex to pin/unpin it.
- Click a midpoint to toggle the edge color.
- Click and drag on the canvas to select multiple vertices.
- Hold Shift and drag a selection box to add vertices to the selection.
- Hold Alt and drag to remove vertices from the selection.
- Hold Z and drag to delete vertices.
- Press A to select all current vertices.
- Press S to deselect all current vertices.
- Press Q to show/hide edges.
- Press W to toggle transparency.
- Colors (below canvas) - Top row is fill color. Far right is no fill. Bottom row is line color.
- Layers (right of canvas) - Layers are drawn from top to bottom. Drag to rearrange, drag to bottom to delete.
- Polygons (right of layers) - Polygons on a layer have the same fill and line color. They also affect each other. For example, to create a hole in a shape, draw another shape inside on the same layer.
- Save/Load - Copy the top text box for the current drawing. Paste into the bottom text box and click "Load" to load a drawing.