diff --git a/docs/source_docs/user_guide/inputs/output/plotting.rst b/docs/source_docs/user_guide/inputs/output/plotting.rst
index b6a21411396206fe165a95844d04536f948624e0..d408dbf9c3f861b7730bdc6098b4be0f98b8c864 100644
--- a/docs/source_docs/user_guide/inputs/output/plotting.rst
+++ b/docs/source_docs/user_guide/inputs/output/plotting.rst
@@ -87,7 +87,7 @@ The following inputs must be preceded by the prefix ``mfix`` and control whether
 +----------------------+--------------------------------------------------------------------------+-------------+-----------+
 |                      | Description                                                              |   Type      | Default   |
 +======================+==========================================================================+=============+===========+
-| write_ls             | Write a plotfile holding the level set and volfrac.                      |   Bool      | false     |
+| write_ls             | Write a plotfile holding the level set and volume fraction.              |   Bool      | false     |
 |                      | If enabled, it will only be written once, after initialization or restart|             |           |
 +----------------------+--------------------------------------------------------------------------+-------------+-----------+
 | write_eb_surface     | Write out the EB geometry in vtp format.                                 |   Bool      | false     |
diff --git a/docs/source_docs/user_guide/inputs/solids_model.rst b/docs/source_docs/user_guide/inputs/solids_model.rst
index f5b3cba797e5dd7eb4da685cc27638097e560da8..aabca8b5cd4854614d39d5bd8ba1663f6d919ae2 100644
--- a/docs/source_docs/user_guide/inputs/solids_model.rst
+++ b/docs/source_docs/user_guide/inputs/solids_model.rst
@@ -103,7 +103,7 @@ Enabling the DEM solver and specifying model options.  The following keys must b
 +-------------------------------+-------------------------------------------------------------------------+----------+-----------+
 |                               | Description                                                             |   Type   | Default   |
 +===============================+=========================================================================+==========+===========+
-| solve                         | Specified name(s) of the DEM types or None to disable the DEM solver.   | Strings  |  "None"   |
+| solve                         | Specified name(s) of the DEM types or None to disable the DEM solver.   | Strings  |  None     |
 |                               | The user-defined names are used to specify DEM model inputs.            |          |           |
 +-------------------------------+-------------------------------------------------------------------------+----------+-----------+
 | friction_coeff.pp             | Friction coefficient :: particle to particle collisions [required]      | Real     |  0        |
diff --git a/undocumented-keys.txt b/undocumented-keys.txt
index 27248636b29b0b42275a9b83dc20352eecba2be0..9ac9c7664a77d7c9fb6aeefd8f03ba6c1f12393e 100644
--- a/undocumented-keys.txt
+++ b/undocumented-keys.txt
@@ -88,20 +88,6 @@ mfix.test_tracer_conservation
 mfix.use_new_depdt_algo
 mfix.use_ppm
 particles.reduceGhostParticles
-pic.advance_vel_p
-pic.beta
-pic.close_pack
-pic.damping_factor
-pic.damping_factor_wall_normal
-pic.damping_factor_wall_tangent
-pic.initial_step_type
-pic.max_iter
-pic.parcels_per_cell_at_pack
-pic.pressure_coefficient
-pic.small_number
-pic.solve
-pic.velocity_reference_frame
-pic.verbose
 pic2dem.convert
 stl.internal_flow
 tracer