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Users may view digital content on a range of devices and contexts, which may mean changing the orientation of the device. Some users may also need to fix their device to a certain orientation for better accessibility.
Content that appears on focus and hover can have accessibility challenges. A user may not have intended to set hover/focus on that content, which may end up covering other page content. If someone uses zoom or magnification on their device, they may not realize important content has appeared elsewhere on the page, out of their viewport.
This can lead to confusing user experiences or barriers to content someone is trying to use.
Users with low vision or other vision disabilities may enlarge text so the content's larger and more readable. Pages that don't keep the content in one column can make users scroll in two directions to find the content off-screen. This takes more effort from the user to track down the overflowing content, or makes content unusable due to it disappearing.
Users that are completely blind, have low vision or have a color vision deficiency will have trouble perceiving content if only color is used to indicate differences. The content should also use patterns to distinguish content as needed, or use meaningful semantics to describe information, rather than relying on color alone.
New in WCAG 2.2
Content that requires a dragging motion can make a task harder to complete for someone that experiences difficulty holding down a pointer device without letting go. This could mean holding down a mouse click, touch press, or other pointing device while moving it to another location. Dragging may also be challenging for someone who navigates by keyboard only, or uses different input methods like speech input or eye/head gaze pointers.