TikZ/PGFTikZ/PGF does not have a dots command as does PSTricks.
Instead, Sketch emits dots as filldraw circles. The
diameter may be set using the option dotsize borrowed from
PSTricks. The dotsize option will be removed from the option
list in the output filldraw command. Other options work in the
expected way. For example, fill sets fill color and
color sets line color of the circles.