Recent releases of Orbitvu VIEWER introduced several long awaited features. In case you've missed it here's a short summary of the most notable things that were added. All of these are available from Orbitvu SUN's presentation's editor (usually at Advanced tab).
Info popup at start
HTML5 version can show infographics (at start) that explains possible VIEWER interactions. Infographics has mobile and desktop versions that illustrate touch and mouse interactions. To switch popup on you can use html5_initial_info parameter with the following values:
all | desktop | touch | no
where desktop will only show infographics on desktop browsers and mobile only on iPhone/Android devices.
Rotation Hint for HTML5
HTML5 version can show small hint that indicates possibility of rotation. It can be added by setting html5_hint parameter with value of yes. Hint will be shown on startup and hidden on every interaction with VIEWER. It will appear again after 5 seconds. There is slightly different hint icon for 3D presentations.
Disable mousewheel zoom
There are cases where it is not desired to have presentation react to mousewheel event. For example, if you're scrolling the page down and presentation happens to be under mouse cursor. From now you can switch off mousewheel event handling both in Flash and HTML5 versions of the VIEWER with mousewheel parameter.
yes | no
Buttons in HTML5 mode
Finally HTML5 version of Orbitvu VIEWER (2.3.24+) supports all the control buttons (zoom in/out, autorotate, drag/rotate etc.) just like Flash version does. The only difference is with mobile devices (Android and iPhone) that tend to use info and fullscreen buttons located in bottom corners. This way it is more natural to interact with presentation using fingers. It looks like that (desktop buttons | mobile buttons):