From the announcement:
After an exceptionally busy summer, we are thrilled to be able to announce the release of Annotation Studio 2.0. The new version of Annotation Studio offers the following features:
- Anchored annotations that correspond to the text currently visible
- Touch capability so that Annotation Studio can be used on mobile devices
- Upload of very basic PDF files
- Slide-in menus with context aware tools
- Private subdomains (e.g., MassU.annotationstudio.org) hosted by HyperStudio
- Improved annotation sidebar
- Wider document view
- Breadcrumb navigation
- Expanded help forum at support.annotationstudio.org
Source: Annotation Studio 2.0 Released