diff --git a/Debug-Tools.md b/Debug-Tools.md
index 1087488..e5f369d 100644
--- a/Debug-Tools.md
+++ b/Debug-Tools.md
@@ -1,6 +1,7 @@
 (work in progress) Also see [[Tips]].
 
 ## Index
+- [Highlight ID Conflicts](#highlight-id-conflicts)
 - [Item Picker](#item-picker)
 - [Metrics/Debugger window](#metricsdebugger-window)
 - [Debug Log](#debug-log)
@@ -11,6 +12,13 @@
 
 ----
 
+## Highlight ID Conflicts
+
+Highlight and show an error message when multiple items have conflicting identifiers.
+Set `io.ConfigDebugHighlightIdConflicts = true` or toggle via `Demo -> Tools -> Highlight ID Conflicts`.
+
+![image](https://github.com/user-attachments/assets/ed30a78f-a446-4e08-a537-25a19f72f226)
+
 ## Item Picker
 
 https://github.com/ocornut/imgui/issues/2673