The messenger icon is displayed on the lower-right corner of the screen with the default bubble launcher icon. If you want to change the launcher by using a different image or object instead of the default bubble icon, you can create a custom launcher to replace it.
Once you're done configuring messenger from the admin panel, your customers will see the icon appear in the lower right corner (as shown in the image below).
You can hide the messenger icon and create a custom launcher that will open the messenger when you click on it.
To hide the widget and create a custom launcher for your Kayako Messenger, you need to perform some advanced template modification.
For more information on this topic, please refer to our developer documentation for creating a custom launcher at the Kayako Developer site.
You may also read the config guide in order to change the launcher icon.
After customizing the messenger widget, you should be able to see the icon you use in the replacement of the default one, which you specified in your code after saving the changes in your configuration.