Sticky elements hiding buttons can leave customers looking at a page without access to the action needed next. A fixed header, bottom bar and expanded widget may each fit the design separately but occupy the task area together. Check a specific button within an actual journey rather than judging the initial screen alone. This matters for mobile conversion, but it can also occur on desktop after zooming or while navigating with a keyboard.
Choose the action the customer cannot perform
Begin with a required action such as Continue after choosing a variant, rather than a catalogue of every fixed element. Record the screen, task state and button position when it should be available. Establish whether the problem concerns seeing, selecting or reading the label. A partly visible button may respond to a pointer, but customers should not have to guess its wording or search for a tiny uncovered fragment to continue.
If a report says “I cannot proceed”, reproduce the route and check whether the action is enabled. Do not classify every failed attempt as a collision when a required selection or task error may explain it. Note whether the covering element is always present or appears after scrolling, expanding a widget or changing orientation. These distinctions limit the correction to a specific layout instead of redesigning the whole page without confirming the cause.
Map elements occupying persistent screen space
Include elements fixed to the viewport or remaining sticky while scrolling. Record the header, bottom action bar, floating contact control and expanded window where they occur in the tested state. For each, identify its edge, occupied area and appearance trigger. Do not analyse only stacking numbers: moving a button above a window can uncover it at the cost of hiding information needed to decide what the customer should do next.
Check elements after loading and after beginning the task, since a widget or bar may appear later. Retain conditions relevant to the issue instead of collapsing everything before taking a screenshot. For contact access, use the article on accessible contact routes. The objective is to complete the task and retain contact access together, rather than reveal one button by removing a communication route the customer actually needs during the process.
Test a matrix of width, zoom and state
A matrix changes the conditions in which layout elements can collide deliberately. Choose a supported narrow screen, a typical desktop view, relevant zoom and the expanded and collapsed widget states. The table proposes attempts for one action without specifying universal dimensions for every website. Record each result with its task state so the person correcting the layout can reproduce the overlap without searching for it somewhere else on an unrelated screen.
Scroll the table sideways to see all columns.
| Condition | Possible collision | Attempt |
|---|---|---|
| Narrow screen | Bottom bar occupies the button area | Scroll to the section end and check access |
| Zoomed view | Header covers the upper content | Reach the button after changing zoom |
| Keyboard navigation | Focus lands beneath a fixed element | Observe the entire Tab route to the action |
| Open widget | Window covers an edge-adjacent button | Compare expanded and collapsed states |
On a phone, include an open on-screen keyboard if customers type before the button. Available space may change midway through a task even when the initial view looked correct. Test whether the button can scroll above the bottom bar rather than assuming another finger movement will expose it. If the page provides no space for that movement, describe the missing scrollable area precisely instead of reporting only that the mobile layout “looks wrong”.
Reach the focused control using a keyboard
A keyboard check follows the natural sequence to the action rather than placing the pointer over an already visible button. Observe whether the focused element is visible and whether the page scrolls to an appropriate position. A fixed header may hide the control the browser has just brought into view. Someone who knows or hears its name still needs a visible working area, so Enter functioning does not by itself resolve the collision.
Record whether coverage is complete or partial and identify its cause. W3C F110 describes complete obscuring of a focused element by a sticky header or footer; do not assign that same conclusion to every overlapping pixel. A partly covered label or target can still be a genuine usability issue worth correcting. Both a criterion assessment and the practical task problem need their own clear evidence rather than an overall impression drawn from a screenshot.
W3C technique F110 addresses a focused element being completely hidden by a sticky header or footer. Partial collisions also need usability review but are not automatically the same failure case described by that technique.
Combine a recording moment with manual reproduction
An available recording may show the moment when a window and bar meet over a button. Mark the preceding action, element appearance and later attempts without assigning intentions from movement alone. A screenshot of that moment helps locate the collision but cannot establish behaviour at every screen size. Confirm the state in a controlled attempt using the relevant width and active elements before assigning a correction to the interface owner.
Use session recording analysis principles and account for capture scope. Review available journeys in Meetlead analytics, but check focus and complete coverage manually too. A screen recording does not replace keyboard verification. Do not evaluate the accessibility of the entire website from one person’s recording when the question concerns a particular action and a defined layout condition that must be reproduced to support a conclusion.
Choose a correction for the specific collision
A correction may reposition a floating element, reserve space beneath a bottom bar or adapt scrolling to a fixed header. The right choice depends on layout and important content, so avoid one universal spacing value. State the result: “With the contact panel open, Continue remains visible and reachable by keyboard”. Agree implementation with the interface owner and existing design rules rather than introducing an isolated workaround whose behaviour elsewhere is unknown.
Do not repair one screen through an arbitrary stacking-order change without checking other controls. After moving the window, ensure customers can still close it and perform the required action inside it. After reserving space, check the content end and avoid unnecessary empty areas in other states. Repeat the same action matrix so the correction is evaluated against the original collision rather than a newly convenient screenshot that no longer represents the problematic conditions.
Verify that the task can continue after the change
The final attempt should establish that customers can perform the formerly hidden action and recognise its outcome. Seeing the label is insufficient if another element still intercepts selection or focus lands somewhere inappropriate. Follow the route with the window open and collapsed and check the narrow screen. Record task completion without turning an uncovered button into evidence of a business conversion that the application has not yet confirmed through its own result.
Some collisions appear on less frequently visited screens, such as after a broken link. When examining these locations, check the article on returning to the task from a 404 page, where the onward link also needs to remain accessible. The reproduced conditions and final attempt are enough to close this focused correction. Retain that description with the task so another fixed-bar change does not recreate the collision later.
Questions about covered buttons
Is making the widget smaller enough? Sometimes, but only after checking what actually covers the action. The problem may be the bottom bar, header or insufficient scroll space.
Repositioning or a layout change can be more suitable than shrinking the window. Also verify the usability of controls inside the widget after the change.
Is a partly visible button unproblematic? Do not assume so. Customers need to recognise its label and perform the action, including by keyboard.
Separate the complete-coverage criterion assessment from other usability problems. Record the observation and required outcome rather than ending the investigation because a fragment of the button remains visible.
