diff --git a/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/c_Line.md b/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/c_Line.md
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index 0000000000000000000000000000000000000000..1bc35acd5c23978fefd95b303d1916acf02c9b69
--- /dev/null
+++ b/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/c_Line.md
@@ -0,0 +1,3 @@
+Declares a source term that is defined on a line shaped sub-domain (line mesh).
+
+The user should carefully check which physical quantity that parameter is.
diff --git a/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/t_parameter.md b/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/t_parameter.md
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index 0000000000000000000000000000000000000000..c8d721a55533cdfa72ed977a48b43a24e1a18a8d
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+++ b/Documentation/ProjectFile/prj/process_variables/process_variable/source_terms/source_term/Line/t_parameter.md
@@ -0,0 +1,4 @@
+The name of the parameter that defines the value that should be used for the source
+term. Nodal parameters are not supported.
+
+The user should carefully check which physical quantity that parameter is.