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Accessible Form Layout Essentials

Cameron Adams
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There are several different ways in which you can lay out a form. The method you choose depends upon how long the form is, its purpose, how often it will be used by each person who has to fill it out, and, of course, the general aesthetics of the web page.

It’s generally considered most efficient to have one form element per line, with the lines stacked sequentially one on top of the other, as most Western-language web pages are designed to scroll vertically rather than horizontally. This allows users to follow the path to completion easily and focus their attention on entering one piece of data at a time.

For each form element in a left-to-right reading system, it’s logical to position the corresponding label in one of three ways:

  • directly above the form element
  • in a separate left column, left-aligned
  • in a separate left column, right-aligned

Each of these approaches has its own advantages and its own look, so consider these options when you’re deciding how to lay out a form for a particular page.

Labels that are positioned directly above a form element have been shown to be processed most quickly by users. The compact grouping between label and element reduces eye movement by allowing the user to observe both simultaneously — here’s an excellent article published by UXmatters. However, this type of positioning is rather utilitarian, and isn’t the most aesthetically pleasing layout. It also has the disadvantage of occupying the most vertical space of the three layouts, which will make a long form even longer. Generally, top-positioned labels work well for short forms that are familiar to the user — see the comment form in the image below, which is from a previous incarnation of the Dress For Dialogue web site.

position-labels-top

Labels that are positioned in a column to the left of the elements look much more organized and neat, but the way in which the text in those labels is aligned also affects the usability of the form.

Right-aligning the text creates a much stronger grouping between the label and the element. However, the ragged left edge of the labels can make the form look messy and reduces the ability of users to scan the labels by themselves, as Luke Wroblewski argues in his article on the subject. In a left-aligned column, the labels instantly become easier to scan, but their grouping with the associated form elements becomes weaker. Users have to spend a little more time correlating the labels with their elements, resulting in slower form completion. An example of left-aligned labels can be seen below.

position-labels-left

The right-aligned column layout shown below allows for quicker association between label and element, so again it’s more appropriate for forms that will be visited repeatedly by the user. Both layouts have the advantage of occupying a minimal amount of vertical space.

position-labels-right

What good examples of accessible forms have you seen recently? Add them in the comments.