Working With Complex Vector Graphics; Working With Complex Layouts; Working With Layers - Adobe 22020772 User Manual

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Design Issues and Accessible Adobe PDF

Working with complex vector graphics

During conversion to Tagged Adobe PDF, a single figure (such as a pie chart) may
produce a structure comprised of multiple text and graphic elements.
In such cases, you may want to select and delete all structure related to the figure
in the logical structure tree and create a simplified structure manually.
One way to avoid this problem is to always provide a single-ruled bounding box
around figures, illustrations, charts, and graphs before converting to PDF.

Working with complex layouts

Generally speaking, the more columns of text, tables, charts, figures, or sidebars
encountered in a layout, the more challenging it is to determine the intended read
order of elements.
In authoring documents, the simpler and more straight-forward the layout, the
more accessible the document will be. If a more complex layout is necessary,
avoid overusing unnecessary ornamentation such as background images, text
overlaying graphics, overlapping figures, etc., which can result in confusing
structure. Most problems created by complex layouts can be alleviated by manual
tagging, but depending on the complexity and number of elements involved, this
can be a tedious process.

Working with layers

When converting documents that contain multiple layers to Tagged Adobe PDF,
layered objects may be arranged in the drawing order rather than the intended
read order. This can create problems when the document is reflowed or read by
a screen reader.
There is generally no good work around for this problem when it occurs.