diff --git a/README.md b/README.md
index 0bf8af4..cfdf5e0 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ This turns out to be a bit of work as shown in https://help.solidworks.com/2021/
 1. Click OK
 
 ## How do I change the appearance of all Configurations?
-
+Reference https://knowledge.cadimensions.com/hubfs/KB%20Reference%20Docs/SOLIDWORKS%20Appearance%20Cheat%20Sheet.pdf?hsLang=en
 1. Right-click on the part in the Part tree and choose the "Appearances" icon which is a multi-colored sphere with a pencil
 1. Pick the part in question
 1. Scroll down to "Display States (linked)" and make sure "All display states" is checked