  Hold down on the symbol above
 Set the contour spacing to one of the dimensions of your box
  Set the contour spacing to the other dimension and click near the line you want the new line to be parallel to
 ...And it will look like this
 Hold down on the box above on the symbol highlighted
 Double click on the symbol and set the depth of the box sides
 Click near the lines and you will get the lines for the box sides
 Hold down the second symbol down on the right... and hold down the one on the end of the line
 Double click on it and set the radius to 0.10mm
 Then click between the points you want to fill |