Abstract: For a presentation comprising a plurality of presentation segments, timing is established through the combination of assigning a portion of a total presentation time to each of the plurality of presentation segments, displaying the time assigned to each of said presentation segments, enabling a user to change the time assigned to the segment being presented, and in response to a change in said time, dynamically reapportioning the remaining total time among the subsequent sequential presentation segments. The reapportioned times for said subsequent sequential presentation segments can further be displayed. There may also be means, responsive to the change in the time, for dynamically eliminating one of said sequential segments. In slide presentations, there may be means for displaying the reapportioned times for said subsequent sequential individual slides together with miniaturizations of each of said subsequent sequential individual slides.