Specify a Math Expression to Define the Datum Line Display

1. From the Datum Lines panel, select the Position tab for either a horizontal or vertical datum line.

Or

2. For a horizontal datum line, in the Position text field, enter a math expression based on “x”, f(x) and press Enter or click Apply.
3. For a vertical datum line, in the Position text field, enter a math expression based on “y”, f(y) and press Enter or click Apply.
   The datum line display is updated to reflect the expression.