How to display ternary diagrams in Grapher with descending axes

1. Click the Home | New Graph | Ternary | Ternary Scatter Plot command.
2. Select your data file and click Open.
3. The ternary plot is created. The X axis is on bottom increasing from left to right. The Y axis is on the right side increasing from bottom to top. The Z axis is on the left side increasing from top to bottom.
   
   

This ternary diagram depicts the normal look, as described in the previous step.

4. Click on the Ternary Plot layer in the Object Manager to select it.
5. In the Property Manager, click on the Plot tab.
6. Change the X variable to the Y data.
7. Change the Y variable to the Z data.
8. Change the Z variable to the X data.
   
   

Set the columns to rotate the variables.

9. Click on the X Axis in the Object Manager.
10. In the Property Manager, click on the Labels tab.
11. In the General section, change the Label source to From worksheet.
12. Click on None next to Worksheet. Select the worksheet that has the data and labels. The data and labels columns may look like this:
    
    

The data and labels columns have the same values, but reversed.

13. Set the Data column to the column in the worksheet that has the data values where tick marks should appear. This can be 0, 20, 40, 60, 80, 100, for instance.
14. Set the Label column to the column in the worksheet that has the label values. These are backwards from the data column. So, this could have 100, 80, 60, 40, 20, 0.
15. Repeat steps 10-14 for the Y Axis and the Z Axis.

The labels are now reversed and the data appears to be descending.

The data is reversed and the labels indicate the opposite direction.

The attached GRF and XLS file show an example of this.

Updated September 17, 2018