diff --git a/README.md b/README.md
index b8056b6..41bbcbb 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,13 @@
 # gitignore-global
 
+Specify global ignore file:
+
+```sh
+git config --global core.excludesfile ~/.gitignore_global
+```
+
+Locate global ignore file:
+
+```sh
+git config --global core.excludesfile
+```
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