Unexpected layout movement can make reading and clicking difficult. Identify elements that arrive after the initial page layout, such as images, embeds and fonts. Reserve appropriate space where possible and avoid inserting content above a person’s current reading position without a clear reason.
A practical approach
Review pages during loading, not just after everything has settled. A finished screenshot can hide a disruptive experience. Check slow-loading assets and optional integrations because they may reveal movement that is invisible on a fast local connection.
Your checklist
- Specify image dimensions or stable aspect ratios.
- Plan space for embeds and dynamic notices.
- Observe the page while assets arrive.
For example
If a large hero image has no reserved height, the text below it may move when the image loads. Giving the layout its intended proportions earlier can keep the reading position more stable.
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