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Why “it should look like this” can leave you stuck
A tutorial asks you to take an action, then often shows an image or sample result. If the instruction says only that your screen or work “should look like this,” you have to guess what to compare. Is the exact color important? The file name? A changed value? The fact that a preview appeared at all?
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That uncertainty matters because a difference can be harmless or signal a real mistake. Two screens may differ because of themes, software versions, window sizes, or personal settings. But a missing label, unchanged value, or absent output may mean a step did not work. An image without an explanation does not help you tell those cases apart.
The phrase “most dangerous” is a pointed way to describe that instructional failure, not a measured finding: the sources cited here do not quantify harm caused by this exact sentence. The practical concern is clearer: readers need expectations and clues that help them judge whether they are on track. Diátaxis tutorial guidance warns that a learner who follows directions without getting the expected result can lose confidence in the tutorial and in themselves (Diátaxis tutorial guidance).
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What a useful visual checkpoint tells you
A screenshot, code sample, diagram, or finished example works best as a checkpoint in a sequence—not as a substitute for the sequence. Ubuntu’s guide-writing guidance recommends regular code checkpoints so readers can synchronize their work with the guide, including at the start of a step (Ubuntu guide-writing guidance).
To make a checkpoint useful, say what the reader should compare and why that detail matters:
- Name the observable evidence: a title-bar file name, a changed setting, a visible status, or a specific line of output.
- Distinguish required details from incidental ones: tell readers whether color, spacing, window arrangement, or other appearance differences are expected.
- Connect the checkpoint to the next action: explain what should be true before the reader continues.
- Give a recovery clue: if the expected evidence is missing, point to a likely cause or a step to check.
For example: “After saving, confirm the file name in the title bar and check that the preview shows the new heading. Your theme may change the colors and spacing; those differences are expected. If the heading is missing, check that you edited the page template rather than the stylesheet.” The useful part is not simply the preview; it is the explanation of what counts and what to try if it is absent.
Separate the instruction from the explanation
Readers need to know both what to do and what the action means, but burying the action in a block of explanation can make the next step hard to find. Technical Writing Essentials, an open textbook hosted by eCampusOntario, recommends explaining how something should look before and after a step, why the step matters, and the principle behind it (Technical Writing Essentials).
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Keep the action easy to locate, then add the context beside it. For instance:
- Action: Save the file.
- Check: Confirm that the title bar shows the file name and that the preview contains the new heading.
- Why it matters: The preview confirms that the page template—not just a style rule—was updated.
- If it differs: Check which file you edited before moving on.
This format lets a reader act without first decoding a long explanation, while still providing the reasoning needed to diagnose a mismatch.
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Use examples and non-examples for different purposes
A successful example shows what meets the goal; a non-example shows where the boundary lies. The UK Department for Education’s 2004 guide Designing lessons notes that non-examples can help establish the boundary of an idea. Cambridge Assessment International Education similarly recommends models that help learners connect successful work with success criteria (Cambridge Assessment for Learning guidance).
When a tutorial has more than one valid result, make the criteria explicit rather than treating one model as the only acceptable appearance:
- State what must be true: identify the required features or behavior.
- Label what can vary: note optional choices, such as theme or layout, when they do not affect success.
- Show a non-example when it clarifies a common mistake: explain specifically why it fails the stated criteria.
These are useful principles for technical tutorials as well as classroom examples, though the cited education guidance addresses learning and assessment rather than studying software tutorials directly.
What to do when your result looks different
Do not assume every visual difference means failure—or that every tutorial screenshot is merely decorative. Compare the evidence the instructions identify: required labels, values, states, or outputs. If those are present and the difference is only a customizable appearance detail, continue. If an expected signal is missing, pause and check the action that should have produced it before building the next step on an uncertain result.
Tutorial authors should test their instructions by observing what readers actually do. Diátaxis guidance calls for testing tutorials with users, while Ubuntu’s checkpoint advice offers a practical way to identify places where readers may lose alignment. A checkpoint is most valuable when it lands at a point where the next step depends on a result the reader can verify.
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