Most of the time, a user will navigate the presentation one slide at a time. The GUI provides a ``go to next slide'' button, an arrow pointing to the right. Clicking this button advances the view to the next slide in the sequence. An analogous ``go to previous slide'' button is also provided.

An equivalent keyboard-input method is also provided. By default, Page Down advances to the next slide, while Page Up regresses to the previous slide. The user may change these default to suit their tastes.

To quickly jump to the beginning or end of a presentation, the user can use the ``go to first slide'' or ``go to last slide'' button, respectively. These, too, have keyboard equivalents: Home and End, be default.

To navigate several slides away, a filmstrip-style display of thumbnail images is provided. To navigate to any slide at all, a user may scroll through the thumbnails until they find the slide they want, clicking to navigate directly. This GUI element also gives the user a way to keep track of where they are in the lecture, as the current slide is highlighted.

A summarry of these navigational elements is provided in figure 2.3.1.1.

Figure 2.3.1.1: A summarry of GUI navigation elements.

Every time the lecturer navigates to a new slide, that change is visible to everyone logged in to the lecture. In most cases, this means that the student's view simply advances. More detail on the lecture navigation facilities provided to students may be found here.

More detailed use cases for the lecturer may be found here.