diff --git a/faq/failed-to-load-resource.md b/faq/failed-to-load-resource.md
index bc9df4aa..2ca19d3e 100644
--- a/faq/failed-to-load-resource.md
+++ b/faq/failed-to-load-resource.md
@@ -52,6 +52,7 @@ Note: the new certificate from Dynamsoft will expire on December 8th, 2023. This
         }
     );
     ```
+
 <!--
 
  1) Go to service directory, and find _DSConfiguration.ini_.  
diff --git a/info/api/WebTwain_Viewer.md b/info/api/WebTwain_Viewer.md
index bc1d33ec..35fe7243 100644
--- a/info/api/WebTwain_Viewer.md
+++ b/info/api/WebTwain_Viewer.md
@@ -2587,32 +2587,14 @@ The default value is 0 (Single). Even if checkbox is used, only one image can be
 
 ## Events
 
-### click
-
-### contextmenu
-
-### dblclick
-
-### mousemove
-
-### mousedown
-
-### mouseup
-
-### mouseout
-
-### mouseover
-
-### keydown
-
-### keyup
+### On
 
 **Syntax**
 
 ```typescript
 /**
  * Built-in callbacks that are triggered for a certain mouse event or keyboard event on a page.
- * @param eventName Specify the event.
+ * @param eventName Specify the event. Value: click, contextmenu, dblclick, mousemove, mousedown, mouseup, mouseout, mouseover, keydown, keyup.
  * @param callback Specify the callback.
  * @argument dwtEvent The viewer-specific event object.
  * @argument domEvent The original mouse event object.