From d066a8eab3e7065d3203614f4bfbd1857a5694d2 Mon Sep 17 00:00:00 2001
From: t-bltg <13423344+t-bltg@users.noreply.github.com>
Date: Wed, 28 Jul 2021 20:16:58 +0200
Subject: [PATCH] doc: explain how to enable debug for multiple modules
 (#41719)

---
 stdlib/Logging/docs/src/index.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/stdlib/Logging/docs/src/index.md b/stdlib/Logging/docs/src/index.md
index f5367d05b14a5..7a6fbbbdd2081 100644
--- a/stdlib/Logging/docs/src/index.md
+++ b/stdlib/Logging/docs/src/index.md
@@ -217,6 +217,9 @@ julia> foo()
 
 ```
 
+Use a comma separator to enable debug for multiple
+modules: `JULIA_DEBUG=loading,Main`.
+
 ## Examples
 
 ### Example: Writing log events to a file