Reading journey fixture
This synthetic page demonstrates page furniture and reference return. It is not a user study or an accessibility certification. Its live figures describe your current viewport, not the illustrative values in the article.
Task: follow the claim's evidence link and return to its heading. Try with and without the offset, then with larger browser zoom. These controls do not simulate every reader preference.
An explanation before the claim
A reader needs enough continuous space to follow an argument. Useful navigation can still compete with that space when several elements remain fixed. This page keeps the reading task constant while changing two layout choices.
The test is not whether a screenshot looks attractive. It is whether a person can reach the relevant passage, inspect its evidence and return with enough context to continue. The outcome depends on viewport, browser behaviour and the elements that actually occupy the page.
The layout should also tolerate longer labels and increased spacing. A fixed-height card can appear correct until its contents need another line. A reference can technically reach a target while a header hides the words the reader was trying to find.
The claim: allow room for the evidence journey
The illustrative argument is that source checking belongs to reading, rather than an interruption to be discouraged. Follow the supporting note, then use its explicit return link. Inspect whether this heading remains visible after returning.
Removing a persistent promotional element is one possible choice. Keeping it but reducing its footprint is another. The fixture demonstrates the space cost; it cannot measure which option improves commercial results or reader understanding.
Use ordinary links and preserve the destination. A person may inspect the source immediately, open it separately or return later. Interface decisions should make the relationship understandable without pretending there is only one legitimate reading style.
Continue the explanation
Scroll a little further so the return journey has a meaningful distance. Repeating the task with enlarged text can expose a header whose height changes. The offset switch uses the observed header height rather than relying on an assumption about how many lines it contains.
The contact prompt remains available at the end of the document when it is removed from its fixed position. This is a demonstration of placement, not a recommendation that every site use the same commercial design.
After following the note, explain which idea you were reading and find the next paragraph. That observation can help a layout review, but a single person's attempt should not be presented as evidence about every reader.
Supporting note
This is synthetic supporting material. The page does not claim that any particular layout has passed a standard. Compare the target heading and surrounding text when you return to the claim.
For normative context, consult the article's W3C and MDN references. The fixture uses measured element geometry to keep a current anchor offset when enabled.