Sometimes a readable or searchable PDF is not in the proper reading order. This means assistive technologies 'read' the PDF content out of order and may jump around areas of a page or between pages in an illogical manner . Doing so can cause confusion. Adobe Acrobat Pro allows you to updated and adjust the reading order of tagged PDFs.
Document tags are essential for formatting content so it can be read by assistive technologies such as screen readers . The Tags Pane is a tree-like listing of all the document's content. If the content is not in the Tags Pane it will likely not be accessible to assistive technologies.
Step 1. Open Tags Pane.
From the menu bar choose View > Show/Hide > Navigation Panes > Tags. The Tags Pane will appear on the left side of the screen.
Note: Be sure to use Adobe Acrobat Pro and not Adobe Acrobat Reader. Adobe Acrobat Reader will not have the tools needed to make the necessary changes to your document .
Before publishing your PDF, do a check of the reading order in the Tags Pane to make sure the content flows in a logical manner and all the tags are correctly coded.
In the Tags Pane, select the plus box or arrow to the left of the Tags tag to open and view the document tags. Select the top tag from the the Tags Pane list (this is typically "Tags." Use the down arrow key on your keyboard to navigate through the document to visually see the reading order. A blue box should appear over each element. Notice how the content order is presented. With some exceptions, content typically follows a right to left, top to bottom order.
If a blue box does not appear around the elements, right click on "Tags" in the Tags Pane then select Highlight Content from the menu.
Adobe Acrobat Pro recognizes specific tags which translate the element type for assistive technology. For example, if your page has images or other non-text content, these will be labeled as Figures in the Tags Pane (to learn more about alternative text for image, refer to Adding Alternative Text to Image in Adobe Acrobat Pro).
If tags in the Tags Pane are not one of the Adobe's approved tags, then you can add a role map to the tag. Refer to the table below for the typical elements and their corresponding tags (All tags are case sensitive).
|Element||Adobe Acrobat Tag|
|Image, Non-Text Content||<Figure>|
Note: Tags can be nested together as children under parent tags.
If the tags are out of visual order (top to bottom, left to right) or out of order needed for context, select a tag from the tags pane. Either drag and drop the tag into its correct place in the reading order or Cut and Paste the Tag under its new Parent Tag..
As you drag the tag over the Tags Pane a black line will appear in places you can drop the tag.