Manual stitches are straight lines, with the needle dropping at every
node. Manual objects are typically used in the creation of Motifs, but
occasionally you may need a manual stitch for a tie or something really small,
where runs will not calculate well – for example when adding a single stitch to
cross a satin column when creating a Celtic knot as previously described.
To protect the user from resizing the design and obtaining a
very large stitch, manual stitches have a property that limits the maximum
length of an individual stitch.
