A new Grow to Page mode enlarges and reduces images as needed to fit the window/screen. The old Fit to Page mode, which reduces but never enlarges, still exists. There are new toolbar buttons for both modes and you can use the Ctrl-G and Ctrl-F hotkeys in the viewer.
The viewer’s slideshow mode and the Movie plugin now prevent the screen-saver, monitor power-down and computer sleep while active, unless the battery level becomes critical. (Note: The screen-saver will not be prevented if password protection is required by the computer’s policy.)
Previously, the viewer only populated its list of next/previous images if it was launched within Opus via a double-click. The list is now generated in all situations (e.g. launching it via the Open With menu, d8viewer.exe or “dopusrt.exe /show”).
A new Preferences option allows you to prevent double-click from starting slideshow mode, unless shift is held down. Useful for those who found they kept triggering slideshows by mistake.
If the viewer is in full-screen mode and you change to another window (e.g. via alt-tab), the viewer will no longer obscure the other window by remaining on-top.