diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/c_THERMO_HYDRO_MECHANICS.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/c_THERMO_HYDRO_MECHANICS.md
new file mode 100644
index 0000000000000000000000000000000000000000..11e90e8358e39c914965cc6fc2fc121a5febb1f9
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/c_THERMO_HYDRO_MECHANICS.md
@@ -0,0 +1 @@
+Coupled thermo-hydro-mechanical process. It is implemented monolithically.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/i_process_variables.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/i_process_variables.md
new file mode 100644
index 0000000000000000000000000000000000000000..7b74dddccb1a3ae3ba02e727ca832c803293dd13
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/i_process_variables.md
@@ -0,0 +1 @@
+The process variables for displacement, pressure and temperature.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/t_displacement.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/t_displacement.md
new file mode 100644
index 0000000000000000000000000000000000000000..b6d5f29924d468888547d4a5f9eef957f496c26c
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/t_displacement.md
@@ -0,0 +1 @@
+Process variable name for displacement.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/t_pressure.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/t_pressure.md
new file mode 100644
index 0000000000000000000000000000000000000000..36a6d4b8b7a6860e66353bd83b152a2cae3de678
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/t_pressure.md
@@ -0,0 +1 @@
+Process variable name for pressure.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/t_temperature.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/t_temperature.md
new file mode 100644
index 0000000000000000000000000000000000000000..f6efd419ab89f60030e6f044c02c53fd9cc44763
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/process_variables/t_temperature.md
@@ -0,0 +1 @@
+Process variable name for temperature.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_biot_coefficient.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_biot_coefficient.md
new file mode 100644
index 0000000000000000000000000000000000000000..2db4bbf026703aea93279258976457595f09ae97
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_biot_coefficient.md
@@ -0,0 +1 @@
+Biot coefficient.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_coupling_scheme.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_coupling_scheme.md
new file mode 100644
index 0000000000000000000000000000000000000000..703141a127a49902cdee92ef1400d2f9496e6223
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_coupling_scheme.md
@@ -0,0 +1,2 @@
+An optional input to select the coupling scheme. So far, only the monolithic
+scheme is available for THERMO_HYDRO_MECHANICS, and this input can be omitted.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_dimension.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_dimension.md
new file mode 100644
index 0000000000000000000000000000000000000000..fe666ef74ad120b10ddadd3f2ee29a0b6b8f8dbc
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_dimension.md
@@ -0,0 +1 @@
+Displacement vector dimension. The displacement dimension must be equal to the mesh dimension.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_density.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_density.md
new file mode 100644
index 0000000000000000000000000000000000000000..722affa8a460db56881b8daeb0831cea20f5ac62
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_density.md
@@ -0,0 +1 @@
+\copydoc ProcessLib::ThermoHydroMechanics::ThermoHydroMechanicsProcessData::fluid_density
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_specific_heat_capacity.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_specific_heat_capacity.md
new file mode 100644
index 0000000000000000000000000000000000000000..024bf06abff1e70b276717295a6360e4cbb3ace1
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_specific_heat_capacity.md
@@ -0,0 +1 @@
+Fluid specific heat capacity is the heat capacity per unit mass of the fluid.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_thermal_conductivity.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_thermal_conductivity.md
new file mode 100644
index 0000000000000000000000000000000000000000..75fd9758ed5dcaf750ef28a4568f5f1e09203711
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_thermal_conductivity.md
@@ -0,0 +1 @@
+Fluid thermal conductivity, the property of fluid to conduct heat.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_viscosity.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_viscosity.md
new file mode 100644
index 0000000000000000000000000000000000000000..f49c37cdbfa92dc9d521c138d352ae4508d33a0a
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_viscosity.md
@@ -0,0 +1 @@
+\copydoc ProcessLib::ThermoHydroMechanics::ThermoHydroMechanicsProcessData::fluid_viscosity
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_volumetric_thermal_expansion_coefficient.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_volumetric_thermal_expansion_coefficient.md
new file mode 100644
index 0000000000000000000000000000000000000000..440f6d0f3143fb2b63caa68149439a5a50675d75
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_fluid_volumetric_thermal_expansion_coefficient.md
@@ -0,0 +1 @@
+Volumetric thermal expansion coefficient of fluid.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_intrinsic_permeability.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_intrinsic_permeability.md
new file mode 100644
index 0000000000000000000000000000000000000000..9559792cd8011dfa8aa950a1d8ffa12ec0d02c9d
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_intrinsic_permeability.md
@@ -0,0 +1 @@
+Permeability of porous medium.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_porosity.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_porosity.md
new file mode 100644
index 0000000000000000000000000000000000000000..418fdcc6bc1a649c41c87583b5d458aff39537a8
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_porosity.md
@@ -0,0 +1 @@
+Porosity of porous medium.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_reference_temperature.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_reference_temperature.md
new file mode 100644
index 0000000000000000000000000000000000000000..6951343d3859fe36e8b0b73e348ebcbf83ca54b6
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_reference_temperature.md
@@ -0,0 +1 @@
+Reference temperature for the thermal part of thermo-hydro-mechanical process.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_density.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_density.md
new file mode 100644
index 0000000000000000000000000000000000000000..197239040b301996ba1eb512365643e2e2880a76
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_density.md
@@ -0,0 +1 @@
+Solid density.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_linear_thermal_expansion_coefficient.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_linear_thermal_expansion_coefficient.md
new file mode 100644
index 0000000000000000000000000000000000000000..38eaff68a74714b0e6f9f31ad19aceb4cae7ba0f
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_linear_thermal_expansion_coefficient.md
@@ -0,0 +1 @@
+Solid linear expansion in one dimension.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_specific_heat_capacity.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_specific_heat_capacity.md
new file mode 100644
index 0000000000000000000000000000000000000000..1696adff39dc64b2f079078467745b99684bd5aa
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_specific_heat_capacity.md
@@ -0,0 +1 @@
+Specific heat capacity, the heat capacity per unit mass of a material.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_thermal_conductivity.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_thermal_conductivity.md
new file mode 100644
index 0000000000000000000000000000000000000000..0d0a26a12127fe7b1ea36565ba9f373e9e0788b2
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_solid_thermal_conductivity.md
@@ -0,0 +1 @@
+Solid thermal conductivity, the property of solid to conduct heat.
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_specific_body_force.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_specific_body_force.md
new file mode 100644
index 0000000000000000000000000000000000000000..b6b5fbd2f1431bee0240db9faade96613b41c726
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_specific_body_force.md
@@ -0,0 +1 @@
+Specific body forces that are used to apply gravitational forces, a vector of size equal to the displacement dimension.
\ No newline at end of file
diff --git a/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_specific_storage.md b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_specific_storage.md
new file mode 100644
index 0000000000000000000000000000000000000000..af55c27a7ae0e332abf290dd82c7621c91c6603b
--- /dev/null
+++ b/Documentation/ProjectFile/prj/processes/process/THERMO_HYDRO_MECHANICS/t_specific_storage.md
@@ -0,0 +1 @@
+Volumetric average specific storage of porous medium and fluid phases.