diff --git a/PLACEHOLDER.md b/PLACEHOLDER.md
index 1eab1fa..46a9440 100644
--- a/PLACEHOLDER.md
+++ b/PLACEHOLDER.md
@@ -14,4 +14,10 @@ graph LR
     B --> NO --> D[Google]
     B --> YES --> C[GREAT!]
     D --> A
-```
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+```
+
+
+> NOTE:\
+> Gitea has support for mermaid.\
+> Doesn't have support for puml.\
+> (obv talking about default behavior)
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