Please note: EVMS Web Technologies recommends trying to avoid the use of tables in PDFs due to their complexity.
For best results when tagging tables, Adobe instructs users to use the application that created the document (Microsoft Word, for example) to add tags when the PDF is made. If the source document isn't available, you can add tags in Adobe Acrobat Pro using the Accessibility tool's Autotag Document command. However, you may have to revise the tags if a table does not have clear borders, headings, columns or rows.
Use the Reading Order tool to edit tagged tables. To repair a mistagged table, open the Reading Order table in the Accessibility pane and click on a table tage type label. Then, click the "Table Editor" button in the Reading Order dialog box. You'll notice the table will be shaded in red. Right-click on any cell and select "Table Cell Properties." Here, you can change the type of cell (Header Cell or Data Cell) and select the cell's attributes such as Row Span and Column Span.
If the table isn't clearly labeled, use the cursor and click and drag to select the entire table. Then, click Table in the Reading Order dialog box.
You may need to use the Reading Order tool to select and redefine cells as well. Adobe instructs users to split combined cells by creating a tag for each cell. To do this, Adobe instructs users to select a single cell from within a merged cell and click the "Cell" button in the Reading Order dialog box. Repeat this process to split each merged cell.