From 21781adb9ee73fa01fb0acc3838e3ee3d6b00b03 Mon Sep 17 00:00:00 2001
From: Bruno Windels <brunow@matrix.org>
Date: Wed, 20 Nov 2019 18:27:25 +0100
Subject: [PATCH] explain the internal name of custom themes

---
 docs/theming.md | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/theming.md b/docs/theming.md
index 71e963b8c3..422d6032d3 100644
--- a/docs/theming.md
+++ b/docs/theming.md
@@ -26,7 +26,10 @@ single directory tree.
 
 Custom Themes
 =============
-Themes derived from the built in themes may also be defined in settings,
+
+Themes derived from the built in themes may also be defined in settings.
+
+To avoid name collisions, the internal name of a theme is `custom-${theme.name}`. So if you want to set the custom theme below as the default theme, you would use `default_theme: "custom-Electric Blue"`.
 
 eg. in config.json: