- Success Criterion 1.4.4
- Conformance level AA
Fixed-Height Containers That Clip Content at 200% Zoom
1.4.4 — Resize Text
Scenario
Setting
An online spreadsheet's toolbar
What’s wrong
Fixed pixel heights on containers causing overlap/overflow-hidden at 200% text-only zoom.
Example
A tester reviewing an online spreadsheet's toolbar finds this: fixed pixel heights on containers causing overlap/overflow-hidden at 200% text-only zoom.
Why it matters
Low-vision people who enlarge text instead of using a screen reader. The practical effect on an online spreadsheet's toolbar: they miss information conveyed only by color.
How to test
Set zoom to 200% and check fixed-height containers: overflow:hidden combined with a fixed height clips content that no longer fits.
How to fix
At 200% text size/zoom, all content and controls must remain visible, readable, and usable — nothing clipped, overlapped, or lost.
Outcome
That one change on an online spreadsheet's toolbar means they read the text clearly against its background.
Who is affected
Low-vision people who enlarge text instead of using a screen reader.
Learn more
- Understanding Understanding document (opens in a new tab)
Related scenarios
- Text and Controls That Get Cut Off at 200% Zoom
- Form Fields That Don’t Grow When Text Is Enlarged
- Font Size Set in Viewport Units That Ignores Browser Zoom
- Viewport Meta Tag That Disables Pinch-to-Zoom on Mobile
- Button or Nav Text That Overflows Its Fixed-Size Container
- Sticky Header That Grows Large Enough to Cover Content