pad
Inches to extend the drawing area around the minimal area needed to draw the graph
type: double | point, default: 0.0555 (4 points)
If pad is a single double, both the x and y pad values are set
equal to the given value. This area is part of the
drawing and will be filled with the background color, if appropriate.
Normally, a small pad is used for aesthetic reasons, especially when
a background color is used, to avoid having nodes and edges abutting
the boundary of the drawn region.
- Graphs