Parameter common to all viewers.
Relative or absolute Image Serving root path.
Specifies a relative or absolute path to Image Serving, from where the viewer retrieves images. If the path does not have a leading /, it is relative to the location of the viewer HTML page. If the path has a leading /, it specifies an absolute path on the same server.
Use only an absolute path in case the Email share module is enabled in the viewer.
Optional. Not needed for standard SaaS (software as a service) usage.