Note Logotypes (text that is part of a logo or brand name) are considered essential. Success Criterion 1.4.10 Reflow Understanding Reflow | How to Meet Reflow (Level AA) Content can be presented without loss of information or functionality, and without requiring scrolling in two dimensions for: Vertical scrolling content at a width equivalent to 320 CSS pixels ; Horizontal scrolling content at a height equivalent to 256 CSS pixels . Except for parts of the content which require two-dimensional layout for usage or meaning. Note 1 320 CSS pixels is equivalent to a starting viewport width of 1280 CSS pixels wide at 400% zoom. For web content which is designed to scroll horizontally (e.g., with vertical text), 256 CSS pixels is equivalent to a starting viewport height of 1024 CSS pixels at 400% zoom.