Give each caption a single job.
Decide what the visitor needs to understand from this frame. It may introduce the outcome, explain the mechanism or answer a hesitation. Write that job in plain language before choosing a headline.
The storytelling guide helps define those roles across a sequence. A set of individually clever captions can still make a confusing overall argument.
Pair the statement with evidence.
For a fictional meal planner, “Your week, already planned” needs a screen showing a useful weekly plan. A generic settings view does not demonstrate the promise. If the product cannot support the claim, revise the claim rather than dressing it up.
Use the value-proposition guide to check the promise. The caption comparisons below are writing examples, not tested performance claims.
Prefer specific language over empty emphasis.
“Create a shopping list from your plan” describes a mechanism. “Unlock the ultimate lifestyle” does not tell the visitor what happens. Specificity can help, provided it reflects the actual product and remains understandable at the viewing size.
Avoid packing several benefits into one long line. If two ideas matter, consider whether they belong in separate frames or whether one should be deferred.
Edit beside the actual composition.
Caption length depends on layout, type, language and available space. Review the words with the chosen screen at a realistic preview size. A sentence that looks short in a document may become a crowded block after translation.
Use readability review before approval. There is no universal magic word count that guarantees clarity.
Keep alternatives tied to a question.
Prepare variants that express meaningfully different arguments, such as the outcome versus the starting workflow. Record what each version is intended to clarify. A synonym swap may be a copy edit without providing a useful research question.
Connect the choice to a test hypothesis where appropriate. For help developing the narrative and designer handoff, see screenshot optimization.
