Create
a rectangle as the backmost object in the design. The rectangle
represents the boundary of the graph design.
Copy and paste the smallest column in your
graph to use it as the bounding rectangle for your design.
Paint the rectangle as desired, or fill and stroke it
with None so that it is invisible.
Create the design using any of the drawing tools, or
position an existing design in front of the rectangle.
Using the Selection tool , select
the entire design, including the rectangle.
Choose Object > Group to group the design.
Choose Object > Graph > Design.
Click New Design. A preview of the selected design appears.
Only the portion of the design that fits inside the backmost rectangle
is visible, but the whole design appears when used in the graph.
Click Rename to name the design.
Creating a graph
design is similar to creating a pattern.