To draw lines and shapes, use the Pencil tool, in much the same way that you use a real pencil to draw. To apply smoothing or straightening to the lines and shapes as you draw, select a drawing mode for the Pencil tool.
.
To draw straight lines and convert approximations
of triangles, ovals, circles, rectangles, and squares into these
common geometric shapes, select Straighten
.
To draw smooth curved lines, select Smooth
.
To draw freehand lines with no modification applied,
select Ink
.
