From 4690f0d792a495c3169661c73ae7da4957d00400 Mon Sep 17 00:00:00 2001
From: Tim Hoffmann <2836374+timhoffm@users.noreply.github.com>
Date: Wed, 12 Jan 2022 19:20:34 +0100
Subject: [PATCH] Backport PR #22209: DOC: Document default join style

---
 lib/matplotlib/lines.py   | 4 ++++
 lib/matplotlib/patches.py | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/lib/matplotlib/lines.py b/lib/matplotlib/lines.py
index 1014c497d9c5..6ae0e16f5e13 100644
--- a/lib/matplotlib/lines.py
+++ b/lib/matplotlib/lines.py
@@ -1293,6 +1293,8 @@ def set_dash_joinstyle(self, s):
         """
         How to join segments of the line if it `~Line2D.is_dashed`.
 
+        The default joinstyle is :rc:`lines.dash_joinstyle`.
+
         Parameters
         ----------
         s : `.JoinStyle` or %(JoinStyle)s
@@ -1307,6 +1309,8 @@ def set_solid_joinstyle(self, s):
         """
         How to join segments if the line is solid (not `~Line2D.is_dashed`).
 
+        The default joinstyle is :rc:`lines.solid_joinstyle`.
+
         Parameters
         ----------
         s : `.JoinStyle` or %(JoinStyle)s
diff --git a/lib/matplotlib/patches.py b/lib/matplotlib/patches.py
index adcf2a1b1a77..3dc875e91004 100644
--- a/lib/matplotlib/patches.py
+++ b/lib/matplotlib/patches.py
@@ -499,6 +499,9 @@ def set_joinstyle(self, s):
         """
         Set the `.JoinStyle`.
 
+        The default joinstyle is 'round' for `.FancyArrowPatch` and 'miter' for
+        all other patches.
+
         Parameters
         ----------
         s : `.JoinStyle` or %(JoinStyle)s