Correct treatment of many (but not all) in-lined-Postscript specials.
Page background settings.
Japanese pTeX DVI extension support (screen shot).
To present your DVI files, Active-DVI features:
Basic effects for presentation (pause, delay, dynamic text color change).
Annotations displayed on demand (similar to pop-up balloons).
Hyper links from slide to slide or to other files (including DVI files).
Replay of previously recorded parts of the display.
Text movements.
Page transitions.
Embedded applications (launched and killed on demand from within. the presentation text source), with precise security policy.
Scratching on slide to interactively modify the text on screen.
Synchronization indications of each slide timing during the presentation, to connect the talk with a recording/playing facility and/or to automate the show.
Active-DVI special effects are set and launched from within your LaTeX source file via the macros of the advi.sty LaTeX package provided by the distribution.
In addition, Caml hackers can program new and fancy Active-DVI effects in the source code of the presenter.