how to show link to external file in dashboard?

 To edit a URL action or add one for the first time, you will have to edit the worksheet that is on view in the dashboard.

1. Click the Worksheet tab and in the drop-down menu, select Actions
2. In the Actions dialog box, click the name of the URL action that needs to be modified, and then click the Edit button. In the URL textbox, type the URL of the desired resource.
   • Alternatively, if you are adding a URL for the first time: In the Actions dialog box, click the Add Action button. In the Add URL Action dialog box, type or paste the desired URL into the URL text field.
3. Click OK.