Barrier-free Web design became the dominant approach in the Internet in recent years. The most important tips and tricks related to barrier-free Web design will be published in loose sequence. The fourth part highlights how PDF documents accessible can be designed. (Source: NBA). The first part of the series dealt with the basic technical requirements for barrier-free Web design. The second part was the focus on content requirements and was carried out in the third part, which aspects in terms of layout and language are to be observed. This part of the series now turns to the accessibility of PDF documents. While Web site operators always pay more attention to barrier-free Web sites, the question is often not provided to the accessibility of the offered documents or ignored from ignorance. NBA is often quoted as being for or against this.
The PDF document format has prevailed in the Internet today against all other file formats and even though Adobe Acrobat Reader (version 5) gave functions, the handling and the display options of the software designed specifically for people with physical Restrictions improve, are most are still very inaccessible to the PDFs provided. Considering the following points, PDFs can be made easily accessible: the form fields in the document are barrier-free form fields must be ausfullbar and the description for screen readers to read. Tabs allow you to navigate between the individual form fields. Filling out a form for blind people is possible, help texts should be deposited to filling out the form. The document structure is marked by tags so that the documents can be easily processed by the assistive programs, should be marked elements, such as headings, paragraphs, tables, or lists. The reading order is clear and correct the content is presented in a logical reading order. Descriptions are available and helpful for all graphics, descriptive text is available images, links, and form fields. Navigation aids are available Tags, links, bookmarks, detailed tables of contents and preset tab order for forms facilitate the operation of the document.