Add a visible progress tracker for multi-step narratives

Add a visible progress tracker that shows both the current step and the full length of the narrative. For example, place a progress bar above a slideshow, use a timebar that updates with the chart, or mirror the sections in a checklist overview that readers can also use for navigation.

Narrative graphics ask readers to manage both content and sequence. A visible tracker tells readers where they are, how much remains, and where they can jump next without breaking orientation.

Mechanism: Progress cues externalize narrative structure, so readers do not have to infer sequence and location from changing content alone.

Evidence: The analyzed slide-based narratives used progress bars, timebars, and checklist overviews to communicate structure, preserve orientation, and support navigation, and the paper identifies these as recurring visual-structuring tactics (Segel & Heer, 2010).

• User Goal: Move through a multi-step explanation while knowing current position and remaining steps.
• Task: Follow a sequence of authored sections or slides.
• Chart Setting: Multi-frame presentations with next/back controls or section tabs.
• Audience: Readers who need help tracking narrative order.
• Success Criterion: Readers can tell where they are and how far the story goes at any step.

Break it when: The graphic is a single-frame view or an intentionally random-access exploratory display with no prescribed order. Why: There is no narrative path to track.

Sacrifice: Progress trackers consume visible space.
Risk: A tracker that does not match the actual sequence misleads readers about where they are.
Mitigation: Keep the tracker synchronized with the real section order and, when possible, make it navigable.

Mistake: Hiding sequence in next/back controls alone without showing total length or current position. Why it fails: Readers cannot tell where they are in the story or how the current step relates to the whole.

Failure Sign: Readers can advance, but cannot tell current section or remaining length from the interface.
Quick Check: At any frame, verify that the current step and total number of steps are visible.
Stronger Test: Step through the sequence and confirm that the progress indicator updates in sync with each frame.

• Add a progress bar or timebar that marks current position and total span.
• Mirror the section structure in a checklist or overview screen when the narrative has named segments.
• Make the tracker itself a navigation device when the interface supports jumping between sections.