# Principles

The principles of a presentation come in three groups. Those of a figure, in any document of the family, form a fourth. Each follows the format of the [reader-ergonomics](https://github.com/Tewf/reader-ergonomics/blob/v1.18.2/standard.md) principles.

| Group | What it covers |
|---|---|
| [Pace: the listener cannot reread](pace/README.md) | what appears on screen, and when, for a listener who cannot stop or replay |
| [Slide: what the room sees](slide/README.md) | the headline, the evidence, the legibility and the colour of one slide |
| [Talk: the speaker and the hour](talk/README.md) | the structure of the talk, the speaker's body, and the questions |
| [Figure: how a figure is drawn](figure/README.md) | how a figure or a diagram is made, reached, laid out, labelled and judged, in any document |