Note
Like drawing with an actual calligraphic pen, when you apply a Calligraphic brush,
such as the 40 pt. Flat brush, the more vertically the path is drawn, the thinner the
path’s stroke appears.
Change the Stroke weight to 3 pt in the Properties panel.
Click the Stroke color in the Properties panel, make sure the Swatches option ( ) is selected,
and select White. Press the Escape key to hide the Swatches panel, if necessary.
Change Opacity to 20% in the Properties panel by clicking the arrow to the right of the value
and dragging the Opacity slider.