Update modules/ROOT/partials/configuration/iframe_attrs.adoc

Author: kemister85

modules/ROOT/partials/configuration/iframe_attrs.adoc

@@ -3,6 +3,8 @@
 
 This option allows adding custom attributes to the editor's content iframe element when running in classic mode. The attributes are applied during the iframe creation.
 
+NOTE: This option only affects the main editor content iframe, not other iframes such as preview frames, dialog iframes, or iframe elements created within the editor content.
+
 
 *Type:* `+Object+`