You can isolate your testing to a single dialog flow (for skills with visual flow dialogs, that is), test out application events, and upload links for supported attachment types using the options in the Skill Tester's menu.

• Application Event – This option tests the application events that are registered to the main flow. Using this option, you can select one of the application events and then interject it into the conversation. You can trigger a flow using this option, or you can use it to insert an application event in the midst of a conversation.
  
  
  Description of the illustration send-event-dialog-skill-tester.png
  
  The Bot Tester conversation view displays <Application Event> to mark the point where you inserted the event into the conversation. To view the event payload, click <Application Event> to open the View JSON window.
  
  
  Description of the illustration application-event-json-tester.png
  
  
• Attach - Enables you to test a user attachment message by entering a URL that hosts the attached document, image, video, or audio files.