Lillicon instructions:

• scroll wheel: zoom
• 'Z' or 'U' key: undo
• click-and-drag: select points
• shift + click-and-drag: modify selection
• option/alt + click-and-drag: pan icon
• ctrl + click-and-drag: drag contour/selection
• delete/backspace key: delete the existing selection

When possible, Lillicon will try to interpret the existing selection as a transient widget (stroke or blob). To ensure that Lillicon is trying to interpret the correct widget, you can click the button on the right.
The rectangle widget requires that you explicitly select it. The supplied slider then controls the width of the selection rectangle.