diff --git a/topics/reference_guide/custom_language_support/language_injection.md b/topics/reference_guide/custom_language_support/language_injection.md
index f758fe162..d358fd353 100644
--- a/topics/reference_guide/custom_language_support/language_injection.md
+++ b/topics/reference_guide/custom_language_support/language_injection.md
@@ -1,7 +1,7 @@
-# Language Injection
-
 <!-- Copyright 2000-2023 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license. -->
 
+# Language Injection
+
 <link-summary>Injecting a language into different language elements.</link-summary>
 
 <tldr>
@@ -309,3 +309,7 @@ Now, inside the editor the injected portion will work as expected where foo is t
 ## Formatting
 
 To control delegation of formatting to containing file, implement [`InjectedFormattingOptionsProvider`](%gh-ic%/platform/code-style-api/src/com/intellij/formatting/InjectedFormattingOptionsProvider.java) and register in `com.intellij.formatting.injectedOptions` extension point (_2022.3_).
+
+## Injection Highlighting
+
+To suppress highlighting from <control>Code | Injected language fragment</control> setting in <ui-path>Preferences | Editor | Color Scheme | General</ui-path>, injection host must implement [`InjectionBackgroundSuppressor`](%gh-ic%/platform/analysis-impl/src/com/intellij/psi/impl/source/tree/injected/InjectionBackgroundSuppressor.java).