| seed | Integer | Seed for the random number generator. Setting this allows for the generation of identical images (exactly the same sizes, positions & colors). | [0, 232) | Random |
| pageWidth | Integer | These measurements are in pixels, but they may be specified in inches with an "Inches" suffix (pageWidthInches, pageHeightInches, ...). An inch is 72 pixels. | [16, 65535] | 512 |
| pageHeight | Integer | [16, 65535] | 512 |
| marginLeft | Integer | [0, 65535] | 0 |
| marginRight | Integer | [0, 65535] | 0 |
| marginTop | Integer | [0, 65535] | 0 |
| marginBottom | Integer | [0, 65535] | 0 |
| arrangementType | Text | The packing formation. | {circular, rectangular} | circular |
| nCircles | Integer | Number of circles. | [2, 2000] | 800 |
| circleSizeDev | Real | The size variability of the circles. This is the σ parameter in a log-normal distribution. A value of 0 will make all circles the same size. | [0.0, 2.0] | 0.2 |
| showNumbers | Text | Controls whether or not circle ID numbers are displayed. | {off, on} | off |
| reverseDraw | Text | If set to on the last circle is drawn first, otherwise the center-most circle is drawn first. | {off, on} | off |
| nLayers | Integer | The number of shape-layers to be draw on top of each packed circle. The remaining parameters have a layer suffix. | [1, 9] | 1 |
| shapeTypen | Text | Draw a filled circle, lines going to tangent circles further from center, or lines going to tangent circles closer to the center. | {circle, outward, inward} | circle |
| coveragen | Text | Which circles in the formation does this layer apply to? | {all, perimeter, body} | all |
| scalen | Real | The ratio of the drawn circle's radius to the packed circle's radius. Values >1 result in overlap. | (0.0, 1000.0] | 1.0/n |
| lineWeightn | Real | Only applies to line-shapes. | (0.0, 1000.0] | 5.0/n |
| dashPatternn | Real[] | Only applies to line-shapes. A even number of comma separated values representing the lengths of dashes & spaces relative to the line weight. | | nothing (solid line) |
| hueMeann | Real | Mean angle on the color-wheel. | [0.0, 360.0) | Random |
| hueDevn | Real | Standard deviation of color-wheel angle. | [0.0, 360.0) | 20 |
| satMeann | Real | Mean color saturation, grayscale = 0, vivid = 1. | [0.0, 1.0] | 0.8 |
| satDevn | Real | Standard deviation of color saturation. This is a Truncated Normal distribution. | [0.0, 1.0] | 0.1 |
| lightMeann | Real | Mean lightness, black = 0, white = 1. | [0.0, 1.0] | 0.5 |
| lightDevn | Real | Standard deviation of lightness. This is a Truncated Normal distribution. | [0.0, 1.0] | 0.1 |
| opacityMeann | Real | Mean opacity, clear = 0, opaque = 1. | [0.0, 1.0] | 1/n |
| opacityDevn | Real | Standard deviation of opacity. This is a Truncated Normal distribution. | [0.0, 1.0] | (n-1)/n2 |
