Assign different fill colors above and below intersecting plots In Grapher

How to fill between plots in Grapher

1. In the Object Manager, click on the Graph to select it.
2. In the Property Manager, click the Fill tab. 
3. In the Between Plots Fill Properties section, click the Add button next to Add fill.
   
4. Next to Plot 1, click the drop-down menu to select the primary plot of interest.
5. Next to Plot 2, click the drop-down menu to select the secondary plot.
6. In the Fill style (Plot 1 > Plot 2) section, select the Pattern, Foreground color, and Foreground opacity you want to use for the fill for where Plot 1 is greater than Plot 2. 
7. In the Fill style (Plot 2 > Plot 1) section, select the Pattern, Foreground color, and Foreground opacity you want to use for the fill where Plot 2 is greater that Plot 1.