Presentations

The PDF file format, starting at Version 1.1, provides for simple slide-show presentations in the manner of Microsoft Powerpoint. These can be played in Acrobat and possibly other PDF viewers, typically started by entering full-screen mode. The AddPresentation operation allows such a presentation to be built from any PDF file.

There are several transition styles:

Split

Two lines sweep across the screen, revealing the new page. By default the lines are horizontal. If the vertical flag is set, vertical lines are used instead.

Blinds

Multiple lines sweep across the screen, revealing the new page. By default the lines are horizontal. If the vertical flag is set, vertical lines are used instead.

Box

A rectangular box sweeps inward from the edges of the page. Set the outward argument to make it sweep from the center to the edges.

Wipe

A single line sweeps across the screen from one edge to the other in a direction specified by the direction argument (see below).

Dissolve

The old page dissolves gradually to reveal the new one.

Glitter

The same as Dissolve but the effect sweeps across the page in the direction specified by the direction argument.

It is the transition from each page named which is altered. The effect_duration option specifies the length of time in seconds for the transition itself. The duration option specifies the maximum time in seconds that the page is displayed before the presentation automatically advances.

For no automatic advancement, specify a negative number.

The direction argument (for Wipe and Glitter styles only) specifies the direction of the effect. The following values are valid:

To remove a transition style currently applied to the selected pages, use RemovePresentation.