A Poster That Must Be Read From Ten Metres in Three Seconds
A student has designed a 30 × 40 cm poster for the school's Van Mahotsav tree-planting drive. It will be pasted at 1.5 m height along a corridor where students walk past at 8–10 m distance, with about three seconds of attention. The poster uses seven different fonts, a title of fourteen words set in capitals at 8 mm letter height, pale yellow lettering on a white background, a 5 cm decorative border in two colours, and six small clip-art trees scattered around the text. Body details - date, venue, class in charge - are mixed into the middle of the title in the same size. The student's teacher likes the border and says the poster 'looks festive'. The poster has to go up tomorrow morning and can still be reworked in one evening.
1. Evaluate the poster against the three-second, ten-metre viewing condition. Use a letter-height rule of thumb to say whether the title is legible, and show the calculation.
Read the worked answer
The poster fails the viewing test on legibility before anything else is considered.
Letter-height rule of thumb: about 2.5 cm of capital letter height per 3 m of viewing distance, for comfortable reading by a person with normal sight. At 10 m that gives roughly 8 cm of capital height; at 8 m, roughly 6.5 cm. The title is 8 mm - about one-tenth of the minimum. Even a viewer standing directly in front of it would struggle, and from the corridor it will read as grey texture.
Other failures against the same condition:
- Seven fonts fragment the word shapes, so the eye cannot lock onto one visual voice.
- Pale yellow on white is a low-contrast pair; at a distance the two values merge into one light field.
- Fourteen words in the title cannot be read in three seconds. Three to five words is the working maximum.
- Mixing date, venue and class into the title destroys hierarchy, so nothing is perceived as the main message.
- Six small trees and a 5 cm border consume space that should belong to the headline and one strong image.
The 'festive' judgement is about the maker's pleasure, not the viewer's perception; the correct test is whether a walker at 10 m can name the event in three seconds.
2. Give a prioritised rework plan for one evening, with numbers where useful, and explain the order of priority.
Read the worked answer
Priority order follows the failure that loses the most information first: legibility, then hierarchy, then image, then decoration.
- Headline size. Cut the title to three or four words, for example 'PLANT A TREE', and set it at about 8 cm cap height, filling roughly the top 40 per cent of the sheet. This alone fixes the ten-metre test.
- Contrast. Change the lettering to dark green or black on white, or white on a solid dark green panel. Keep the highest contrast for the headline and a lower contrast for everything else, so the eye ranks the information automatically.
- Hierarchy. Reduce to two type families at most, one bold for the headline and one plain for details. Move date, venue and class to the bottom third at a smaller size, still readable at 2–3 m.
- Image. Replace six small clip-art trees with one large, simple tree silhouette or a single strong leaf shape that reads at 10 m as a shape, not as detail.
- Border. Reduce the 5 cm border to 1–1.5 cm and drop to one colour, freeing about 15 per cent of the sheet for the message.
Order of priority is not aesthetic preference: each step removes a barrier to the poster doing its only job, which is to be read and acted on by a moving viewer.
3. The student argues that a 'simple' poster is a 'lazy' poster. Write a short response that uses the idea of visual hierarchy to justify simplification.
Read the worked answer
Simplification is not the absence of work; it is the result of deciding what matters and removing what competes.
Visual hierarchy means arranging elements so the eye goes to the most important one first, then the second, then the third. The eye can only rank a few levels at once - in practice about three. When a poster offers seven fonts, fourteen title words, six images and a heavy border, all at similar visual weight, the eye has no ranking to follow, so it gives up and moves on. That is not richness; it is noise.
A simple poster gives the viewer an obvious first stop (the headline), a second stop (the image or date) and a third stop (the details). Everything else is either removed or made quiet. The work is in the choosing: which four words, which one image, which contrast pair.
A fair way to settle the argument in class is the squint test. Squint at both versions from across the room. In a good poster you can still tell what the main message is; in a busy one everything turns into an even grey field. The viewer's eye, not the maker's effort, is the judge.