This is a sub-chapter of the Mesh Parameters chapter
Shape - choose between round, angular or combined shape of knots.
Round Celtic Knots
Thickness controls the width of strands forming the knot mesh.
Size is dimension of individual knot measured like shown on the following illustration
Structure / Unweave . Increase this value if you want more knots to be formed inside the fill.
Span defines extent of knot fill with respect to object contours. Possible values are Overflow , Cropped , Interior . In case of Overflow fill you may want to exclude object contours from the mesh. This can be done in Common Settings tab.
Align to Common Grid . This option allows to align knots in individual objects to the same grid. To make this alignment work the objects must have same size of the knots and no effect or transformation can be used.
No alignment
Aligned to common grid