diff --git a/docs/source/input.rst b/docs/source/input.rst
index 8c175c1f..bb570578 100644
--- a/docs/source/input.rst
+++ b/docs/source/input.rst
@@ -879,9 +879,9 @@ Allows you (advanced) control of the parameters that are used to build each orde
 * ``f1 f2`` are the minimum and maximum values for the CFS :math:`\alpha` parameter.
 * ``str3`` is the type of scaling to use for the CFS :math:`\kappa` parameter. It can be ``constant``, ``linear``, ``quadratic``, ``cubic``, and ``quartic``.
 * ``str4`` is the direction of the scaling to use for the CFS :math:`\kappa` parameter. It can be ``forward`` or ``reverse``.
-* ``f3 f4`` are the minimum and maximum values for the CFS :math:`\kappa` parameter.
+* ``f3 f4`` are the minimum and maximum values for the CFS :math:`\kappa` parameter. The minimum value for the CFS :math:`\kappa` parameter is one.
 * ``str5`` is the type of scaling to use for the CFS :math:`\sigma` parameter. It can be ``constant``, ``linear``, ``quadratic``, ``cubic``, and ``quartic``.
 * ``str6`` is the direction of the scaling to use for the CFS :math:`\sigma` parameter. It can be ``forward`` or ``reverse``.
 * ``f5 f6`` are the minimum and maximum values for the CFS :math:`\sigma` parameter.
 
-The CFS values (which are internally specified) used for the default first order PML are: ``#pml_cfs: constant forward 0 0 constant forward 1 1 quartic forward 0 None``. Specifying 'None' for the maximum value of :math:`\sigma` forces gprMax to calculate it internally based on the relative permittivity and permeability of the underlying materials in the model.
+The CFS values (which are internally specified) used for the default standard first order PML are: ``#pml_cfs: constant forward 0 0 constant forward 1 1 quartic forward 0 None``. Specifying 'None' for the maximum value of :math:`\sigma` forces gprMax to calculate it internally based on the relative permittivity and permeability of the underlying materials in the model.