We're hoping to provide some limited access to the web viewer in late November, which would be enabled by Adobe rather than self-service through the dashboard. It will support just HTML articles and InDesign raster (not PDF) at that time. We'll post a message in the forums if we can provide this limited access.Support for InDesign PDF, as well as the ability to self-enable web viewer in the dashboard, is targeting end of year.Brian

You cannot currently, but we're working hard on the web viewer.