1. Icons Over Bars

A composed chart that layers icons directly on top of the bars in their respective time slots.

2. Dedicated Event Lane

A separate column next to the time labels is reserved for event icons, keeping the main bar chart area clean.

3. Highlighted Bar Segments

The bar for a time block containing an event has a small, distinctly colored segment at its tip.

4. Split Bars

The bar for a time block is split, with a thin colored line appearing next to the main bar if an event occurred.

5. Annotated Regions

The chart uses a shaded background (ReferenceArea) to highlight the time blocks that contain events.

6. Dotted Line Overlay

A dotted line connects icons on a secondary axis, showing the sequence and timing of events relative to the symptom bars.