Add charts, maps and captions to clarify ideas
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Learning Objectives
- 1Select appropriate visual types (charts, maps, infographics, photos, tables) to support specific informational writing purposes
- 2Write effective figure captions that include a figure number, description, key insight, and source citation
- 3Integrate visuals into informational writing by referencing them in the body text with figure numbers
- 4Evaluate whether a visual adds clarity or creates clutter and revise visual choices accordingly
Mini Lesson
Informational writing becomes clearer and more convincing when you pair your words with well-chosen visuals. A chart can show trends at a glance, a map can reveal geographic patterns, and an infographic can summarize a complex process in one image. The key is choosing the right visual for the right purpose — and then writing a caption that tells the reader exactly what to notice.
Types of Visuals and When to Use Them
- Chart (bar, line, pie) — use when comparing quantities, showing change over time, or displaying proportions.
- Map — use when location, distribution, or geographic relationships are central to your argument.
- Infographic — use when a process, hierarchy, or multi-part concept needs to be shown all at once.
- Photo — use when concrete visual evidence of a real subject, place, or event strengthens your claim.
- Table — use when precise numerical or categorical data must be compared across multiple variables.
Anatomy of an Effective Caption
- Figure number — "Fig. 1", "Fig. 2", etc. — so you can refer to it in your body text.
- Description — a brief, neutral statement of what the visual shows (one sentence).
- Key insight — the most important thing the reader should take away from the visual.
- Source citation — where the data or image came from (author/organization, year).
Referencing Visuals in Your Body Text
Never drop a visual into your writing without pointing to it. Use phrases such as "As shown in Fig. 1…", "The map in Fig. 2 illustrates…", or "According to the chart (Fig. 3)…". This tells the reader when to look at the visual and why it matters to your argument.
Visuals that Add Clarity vs Visuals that Create Clutter
- Add clarity: the visual shows something that is hard to express in words alone.
- Add clarity: the visual is directly referred to in the surrounding paragraphs.
- Create clutter: the visual repeats information that is already fully covered in the text.
- Create clutter: the visual is decorative only — it looks nice but adds no information.
- Create clutter: too many visuals on one page overwhelm the reader and compete for attention.
Caption example — "Fig. 1. Annual average temperatures in Malta from 2000 to 2020. Temperatures rose by approximately 1.4°C over the period, supporting the argument that local climate change is accelerating. Source: Malta Meteorological Office, 2021." Tip: ask yourself — "Would a reader miss something important if I removed this visual?" If the answer is no, cut it. Every visual must earn its place.
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