Clicking the “Resource” button in the left part of the Authoring screen and then clicking the “Add” button will add the relevant resource.Note that the file size of a resource to be added must not exceed 10 MB.
When you need to register a 10-MB or larger resource, close the Authoring screen and then add the resource through the “Resource Management” screen.
Please refer to the following manual.
【Web】7.4 Adding Resources