# 19 · Composition modes

**PRINCIPLE** — One system, six controlled expressions.

**RULE** — A Pure minimal · B Photo hero · C Measured information · D Editorial/information · E Campaign/impact · F Occasion. One mode per surface; modes share grid, colour, type and the one-signal rule.

**WHEN TO USE** — Every communication surface.

**WHEN NOT TO USE** — Product UI (keeps its component logic).

**DO**
- Choose the mode from the message
- Vary modes across a feed or campaign

**DON’T**
- Combining devices from several modes
- Using E for everyday content

**EXAMPLE** — See board Composition modes (06).