Guidelines to Tag Tables

Tables in PDF documents must be structured correctly to ensure accessibility for all users, including users with visual or mobility impairments. Proper table tagging enables assistive technologies to interpret and navigate tabular content accurately. 

Table tagging guidelines 

• Use table headers and captions to clearly define the table structure, content, and purpose 
• Ensure each table cell is associated with the correct header using the Header Cells option in the table properties 
• Apply proper table markup so assistive technologies can interpret the table correctly 
• Avoid using merged cells or nested tables, as these can reduce readability for screen reader users 
• Provide alternative text where needed:  
  • Use Alt Text or Description for images or charts embedded in tables 
• Use high-contrast colors and accessible fonts to improve readability for users with visual impairments 
• Ensure the table follows a logical reading order, so screen readers read content row by row rather than column by column