diff --git a/doc/conf.py b/doc/conf.py
index ca41a854..4454ecd4 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -63,7 +63,14 @@
 # master_doc = "index"  # NOTE: will be changed to `root_doc` in sphinx 4
 
 numpydoc_xref_param_type = True
-numpydoc_xref_ignore = {"optional", "type_without_description", "BadException"}
+numpydoc_xref_ignore = {
+    "optional",
+    "type_without_description",
+    "BadException",
+    "keyword-only",
+    "positional-only",
+}
+
 # Run docstring validation as part of build process
 numpydoc_validation_checks = {"all", "GL01", "SA04", "RT03"}
 
diff --git a/doc/format.rst b/doc/format.rst
index ecdd1d4f..610b7039 100644
--- a/doc/format.rst
+++ b/doc/format.rst
@@ -212,6 +212,13 @@ used as a value, ``optional`` is preferred. These are all equivalent::
   copy : bool, default=True
   copy : bool, default: True
 
+Use ``positional-only`` for positional-only parameters, and ``keyword-only``
+for keyword-only parameters::
+
+  x : int, positional-only
+  y : int, keyword-only
+  z : int, keyword-only, optional
+
 When a parameter can only assume one of a fixed set of values,
 those values can be listed in braces, with the default appearing first::
 
diff --git a/doc/install.rst b/doc/install.rst
index c72d777f..d2990199 100644
--- a/doc/install.rst
+++ b/doc/install.rst
@@ -91,7 +91,7 @@ numpydoc_xref_ignore : set or ``"all"``
   used in parameter type descriptions that may be confused for
   classes of the same name. For example::
 
-      numpydoc_xref_ignore = {'type', 'optional', 'default'}
+      numpydoc_xref_ignore = {'type', 'optional', 'default', 'keyword-only', 'positional-only'}
 
   The default is an empty set.