Returns #t if v is a slide produced by most-recent-slide or retract-most-recent-slide.

Returns a slide structure that may be supplied to re-slide to make a copy of the slide or slide->pict to re-extract the entire slide as a pict.

Cancels the most recently created slide, and also returns a slide structure that may be supplied to re-slide to restore the slide (usually in a later position).

Re-inserts a slide, lt-superimposeing the given additional pict.

Converts a complete slide to a pict. The bounding box of the result corresponds to the slide within its margins.