SizeSizeSets the minimum and maximum size of the dots.
The "Small size"
and "Large size" controls both change the relative size of the
dots. Both controls work in a similar way.
The "Small size" control changes the minimal size of the dots which
are displayed at the brightest end of the image. Setting this value
below 0%, the default value, will make a larger part of the image
emptied of the dots. A higher value will make even brightest part
of the original image contain dots.
The "Large size"
slider changes the dot-size for the other side of the spectrum, the
darkest areas. By setting it to a lower value than the default
value of 100% you limit the size of the dots and by setting it to a
higher value you increase the size.