Double Zigzag stitch 
is a row of small stitches going forward, followed by a zigzag row of small stitches going backward, so it ends at the same point where it began.
Note: Double Zigzag is a special stitch type, recommended for lace. A running stitch line is retraced in a zigzag pattern to create a mesh if sections are placed together. Alternatively, use this stitch type for crosshatch fill.
To show the Double Zigzag dialog
-
Click a Double Zigzag line so that the points defining it are shown, then Control–click and choose Properties.
-
Select Double Zigzag in the line pop-up menu in the stitch type section of the Create toolbar, then click the Options button and select Fill Area and Line from the pop-up menu. In the Area Properties dialog, click Line.
Length
Set the Length of Double Zigzag stitch from 1 to 12mm in steps of 0.1mm. The initial setting is 2mm.
Zigzag Width
Set the Width of the Zigzag part of the stitch from 0.2 to 6mm in steps of 0.1mm. The initial setting is 2mm.
Include a Linking Stitch
Use a linking stitch between sections of Double Zigzag.