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Reading Order tool for PDFs (Acrobat Pro)

Last updated on Sep. 28, 2022 | Also applies to Adobe Acrobat 2017, Adobe Acrobat 2020

Reading Order tool overview

The Reading Order tool provides the easiest and quickest way to fix reading order and basic tagging problems. When you select the tool, a dialog box opens that lets you see overlay highlights that show the order of page content. Each highlighted region is numbered and highlighted with gray or colored blocks; the number indicates the region’s placement in the page’s reading order. After you check the reading order of the page, you can correct other, more subtle tagging issues as needed.

The Reading Order tool is intended for repairing PDFs that were tagged using Acrobat, not for repairing PDFs that were tagged during conversion from an authoring application. Whenever possible, return to the source file and add accessibility features in the authoring application. Repairing the original file ensures that you don’t have to repeatedly touch up future iterations of the PDF in Acrobat.

You can use the Reading Order tool to perform the following accessibility tasks:

Visually check, and then repair, the reading order of page content
Tag fillable form fields and their labels
Add alternate text to figures and descriptions to form fields
Fix the tagging of simple tables, and prepare complex tables for more advanced manipulation in the logical structure tree
Remove nonessential content, such as ornamental page borders, from the logical structure tree

To perform advanced reading order and tagging tasks, such as fixing complex tables, removing obsolete tags, and adding alternate text to links, use the Tags panel. For more information, see Edit tags with the Tags panel.

Tips for using the Reading Order tool

Save the document (or a copy of it) before you use the Reading Order tool as undo-redo is not supported for all operations. For more information, see Undo or redo the tag changes done using the Reading Order tool.
Choose View > Page Display > Single Page View, when using the Reading Order tool. When you click the Clear Page Structure button, Acrobat clears tags from all visible pages, even pages that are only partially visible.

Select the Reading Order tool

Choose Tools > Accessibility, and then choose Reading Order in the right pane. The Reading Order tool's dialog box is displayed.

Reading Order options

You can select Reading Order options from the dialog box, from the pop-up menu that appears when you right-click a highlighted region, or from the options menu in the Order panel. The Reading Order tool includes the following options:

Text/Paragraph

Tags the selection as text.

Figure

Tags the selection as a figure. Text contained within a figure tag is defined as part of the image and screen readers don’t read it.

Form Field

Tags the selection as a form field.

Figure/Caption

Tags a selected figure and caption as a single tag. Any text contained in the tag is defined as a caption. Useful for tagging photos and captions and preventing caption text from being incorrectly added to adjacent text blocks. Figures may require alternate text.

Heading 1, Heading 2, Heading 3, Heading 4, Heading 5, Heading 6

Tags the selection as a first, second, third, fourth, fifth, or sixth level heading tag. You can convert heading tags to bookmarks to help users navigate the document.

Table

Tags the selection as a table after the selection is analyzed to determine the location of headings, columns, and rows.

Cell

Tags the selection as a table or header cell. Use this option to merge cells that are incorrectly split.

Formula

Tags the selection as a formula. Because speech software may handle formula tags differently from normal text, you may want to add a description using alternate text.

Note

Tags the selection as a note.

Reference

Tags the selection as a reference.

Background/Artifact

Tags the selection as a background element, or artifact, removing the item from the tag tree. That way, it doesn’t appear in the reflowed document and screen readers don’t read it.

Table Editor

Automatically analyzes the selected table into cells and applies the appropriate tags. The table must be tagged as a table before you can use the Table Editor command on it.

Show Page Content Groups

Shows content elements as highlighted areas that contain numbers to indicate the reading order. Specify the highlight color by clicking the color swatch.

Show Table Cells

Highlights the content of individual table cells. Specify the highlight color by clicking the color swatch.

Display Like Elements In A Single Block

Adjacent squares with the same tag type are collapsed into a single, bigger square with the common tag type that encompasses the original square.

Show Tables And Figures

Outlines each table and figure with a crossed-out box. The box also indicates whether the element includes alternate text. Specify the box color by clicking the color swatch.

Clear Page Structure

Removes the tagging structure from the page. Use this option to start over and create a new structure if the existing structure contains too many problems.

Show Order Panel

Opens the Order tab for reordering highlighted content.

Edit Alternate Text

Available in the menu that appears when you right-click a highlighted figure. Allows the user to add or edit a text description about the figure properties that a screen reader or other assistive technology reads.

Edit Form Field Text

Available in the menu that appears when you right-click a form field. Allows the user to add or edit a form field text description that a screen reader or other assistive technology reads.

Edit Table Summary

Available in the menu that appears when you right-click a highlighted table. Allows the user to add or edit a text description about the table properties that a screen reader or other assistive technology reads.

Check and correct reading order (Acrobat Pro)

You can quickly check the reading order of tagged PDFs by using the Reading Order tool. You can also use this tool to add alternate text to images and correct many types of tagging problems that are outlined in the report that Acrobat generates when you add tags to a PDF.

Reading-order problems are readily apparent when you use the Reading Order tool. Each section of contiguous page content appears as a separate highlighted region and is numbered according to its placement in the reading order. Within each region, text is ordered left to right and top to bottom. (You can change this order in the Touch Up preferences.) If a single highlighted region contains two columns of text or text that won’t flow normally, divide the region into parts that can be reordered. Because highlighted regions are rectangular, they may overlap somewhat, especially if their page content is irregularly shaped. Unless page content overlaps or is contained within two highlighted regions, no reading order problem is indicated. Page content should belong to no more than one highlighted region.

You can change the reading order of the highlighted regions by moving an item in the Order panel or by dragging it on the page in the document pane. By reordering highlighted regions on the page, you can make a figure and caption read at the specific point that they are referenced in the text. By changing the order of a highlighted region, you effectively change the reading order of that item without changing the actual appearance of the PDF.

Check reading order with the Reading Order tool

Select the Reading Order tool in the right pane.
In the Reading Order dialog box, select Show Page Content Groups, and then click Page Content Order.

Note:

If highlighted regions don’t appear in the document pane, the document doesn’t contain tags.
Optionally, do any of the following:
- To specify a highlight color, click the color swatch, and then click the color you want.
- To highlight tables and figures, and to view alternate text for figures, select Show Tables And Figures.
Check the reading order of text within each highlighted region.

Note:

Zooming in can make this step easier.
Check the numbered order of all highlighted regions. If consecutive, numbered regions don’t follow one another, reorder them in the Order panel.
Click Show Order Panel, and then select each content entry (in brackets [ ]) in the Order panel to highlight that content region in the document pane. Use this method to find numbered regions that you can’t see or locate on the page.

Change the reading order in the Order panel

Select the Reading Order tool in the right pane.
In the Reading Order dialog box, click Show Order Panel.
In the Order panel, navigate to view a list of highlighted regions that appear in the document pane.
In the Order panel, drag the tag for a highlighted region to the location you want. As you drag, a line appears to show potential locations. After you drag an item to a new location, the highlighted regions are renumbered to show the new reading order. You can select and move multiple, adjacent regions.

Change the reading order by dragging on the page

Select the Reading Order tool.
In the Reading Order dialog box, select Show Page Content Groups, and then click Page Content Order.
In the document pane, place the pointer over the number for the highlighted region you want to move. Thenh, drag it to where you want it to be read. The text-insertion pointer shows target locations within the text.

When you release the highlighted region, the location of the text-insertion pointer becomes the dividing line. The underlying highlighted region is split into two new highlighted regions. All highlighted regions are renumbered to show the new reading order.

Edit tags with the Reading Order tool (Acrobat Pro)

You can use the Reading Order tool to create tags in untagged PDFs or to add new tags to an existing structure. However, this manual tagging doesn’t provide the same level of detail to the tagging structure as the Add Tags To Document command, such as paragraphs, bulleted and numbered lists, line breaks, and hyphens. Before you clear the existing structure, make sure that manual tagging is your only recourse.

Using the Reading Order tool, drag within the document pane to select a region of the page that contains one type of content (for example, a text block).
Do one of the following:
- To add more page content to the current selection, Shift-drag.
- To remove page content from the current selection, Ctrl-drag.
Click the appropriate button in the Reading Order dialog box to specify the tag type.

Change the tag for a region

If Acrobat tags a page element incorrectly, you can change the tag type for the highlighted region.

Select the Reading Order tool in the right pane.
In the Reading Order dialog box, select Show Page Content Groups, and then click Page Content Order.
To select a highlighted region, do one of the following:
- Drag to select it.
- Click the number of a highlighted region.
Click the button for the tag type that you want for the highlighted region.

Undo or redo the tag changes done using the Reading Order tool

Note:

The undo or redo the reading order changes is supported for all tags except the following:

Table, Table Editor, and related tags.
Tag creation and tag changes done using Drag and Select in the Reading Order tool.

In Acrobat, to undo the reading order changes, click Edit > Undo Edit. To redo the changes, click Edit > Redo Edit.

Add or remove content from a tagged region

The Reading Order tool always displays as few highlighted regions as possible. If content within a highlighted region doesn’t flow properly, you may need to split a region to reorder it. Highlighted regions may also contain adjacent page content that is unrelated or that requires a different tag type. Page content may become orphaned from related elements, particularly if the content doesn’t fit within a rectangular shape. Use the Reading Order tool to add or remove content from a region, or to split a region to reorder the content.

Select the Reading Order tool.
In the Reading Order dialog box, select Show Page Content Groups, and then click Page Content Order.
In the document pane, select a highlighted region.
Do one of the following:
- To add content to the current selection, Shift-click the content you want to add. The pointer changes to include a plus sign (+).
- To remove content from the current selection, Ctrl-click the content you want to remove. The pointer changes to include a minus sign (-).
Click the button for the tag type that you want for the highlighted region.

Split a region into two regions

Select the Reading Order tool.
In the Reading Order dialog box, select Show Page Content Groups, and then click Page Content Order.
In the document pane, drag to select a small portion of content near the boundary of the first region that you want to create.
Click the Background/Artifact button in the dialog box. The highlighted region splits into two regions, numbered from right to left.
To correct the reading order, click Show Order Panel, and drag the new highlighted region to the correct location in the Order panel.
Drag to select the first content region you created, including the Background/Artifact. Then set the tag by clicking a button in the Reading Order dialog box.

Apply a heading tag

To help readers navigate a document and find the information they need, make sure that headings are tagged with the appropriate level to indicate their hierarchy in the content.

Select the Reading Order tool, and then select the heading text in the PDF.
In the Reading Order dialog box, click the button corresponding to the appropriate heading tag (for example, Heading 1, Heading 2).

Note:

After applying heading tags, you can convert the headings to bookmarks to improve navigation. For more information, see Add tagged bookmarks.

Remove page elements from the tag structure

When tagging a PDF, Acrobat can’t always distinguish between instructive figures and decorative page elements. Items that visually enhance page layout, such as decorative borders, lines, or background elements, can add clutter to the structure layout and should be removed. Therefore, Acrobat may incorrectly tag artifacts or page elements as figure tags. You can remove artifacts and irrelevant page elements from the tag structure by redefining them with the Background/Artifact tag or by deleting their tags. If a tagged image in the document doesn’t contain useful or illustrative information for the user, you can remove the element from the tagging structure so that it isn’t read out loud or reflowed.

Select the Reading Order tool.
In the Reading Order dialog box, select Show Page Content Groups, and click Page Content Order. Then, select Show Tables And Figures.
Remove the page element by doing one of the following:
- In the document pane, select the page element, and then click Background/Artifact in the dialog box.
- In the Order panel, select the page element, and then press Delete.

Edit tags for figures and tables (Acrobat Pro)

You can use the Reading Order tool to add and edit tags and alternate text for figures and tables.

Apply a figure tag

You can select an element and define it as a figure by using the Reading Order tool. Once you define it as a figure, you can add alternate text to describe the figure.

Using the Reading Order tool, select the figure.
In the Reading Order dialog box, click Figure.
In the document pane, right-click the region and choose Edit Alternate Text.
Enter alternate text, and click OK.

Check and correct figure tags

You can use the Reading Order tool to identify and correct tagging results for figures. Determine whether figures include or require alternate text necessary to be read correctly with assistive technologies. Ideally, figure tags should identify image content that is meaningful to the document as a whole, such as graphs or illustrative photographs. If background/artifact elements that shouldn’t be read are tagged as figures, redefine them as background/artifact.

Select the Reading Order tool, and then click Show Tables And Figures in the dialog box.
Do any of the following:
- If a figure isn’t tagged as a figure, select the content region you want, and then click Figure or Figure/Caption in the dialog box.
- To remove text that was incorrectly combined with a figure, drag to select the text, and click the Text/Paragraph button in the dialog box.
- To include a caption that is grouped with the figure, select the figure and caption, and click the Figure/Caption button in the dialog box.

Check and add alternate text for figures

If you want screen readers to describe graphical elements that illustrate important concepts in a document, you must provide the description using alternate text. Figures aren’t recognized or read by a screen reader unless you add alternate text to the tag properties. If you apply alternate text to text elements, only the description, not the actual text, is read.

Select the Reading Order tool.
Select Show Tables And Figures in the dialog box.
Right-click the figure, and choose Edit Alternate Text from the pop-up menu.
In the Edit Alternate Text dialog box, type a new (or edit an existing) description for the figure, and then click OK.

Edit table tags and tag unrecognized tables

Tables pose a special challenge for screen readers because they present textual or numerical data to be easily referenced visually. Content within table cells can be complex and might contain lists, paragraphs, form fields, or another table.

For best results when tagging tables, use the application that you created the document with to add tags when you create the PDF. If a PDF isn’t tagged, you can add tags by using the Add Tags To Document command. Most tables are properly recognized using this command; however, the command may not recognize a table that lacks clear borders, headings, columns, and rows. Use the Reading Order tool to determine if the table has been properly recognized and to correct recognition problems. To add specialized formatting to tables and table cells, use the Tags panel.

You can use the Table Editor to automatically analyze a table into its components and apply the appropriate tags, but you may still need to check and correct some of these tags manually. By viewing table tags, you can determine whether columns, rows, and cells have been correctly identified. Tables that lack well-defined borders and rules are often tagged incorrectly or contain adjacent page elements. You can correct poorly tagged tables by selecting and redefining them; you can split combined cells by creating a tag for each cell.

To correct complex tagging problems for tables, you often must use the Tags panel.

Select the Reading Order tool, and then click Show Tables And Figures.
If the table isn’t clearly labeled in the document pane, drag to select the entire table, and then click Table in the dialog box.
Click Show Table Cells to make sure that all cells in the table are defined as individual elements.
If cells don’t appear as separate elements, do one of the following:
- If one or more cells are merged, use the Reading Order tool to select the area within a single cell, and then click Cell in the dialog box. Repeat for each merged cell.
- If cells aren’t highlighted, the table might not use standard table formatting. Re-create the table in the authoring application.
If the table contains cells that are intended to span across two or more columns, set ColSpan and RowSpan attributes for these rows in the tag structure.

Remove or replace document structure tags (Acrobat Pro)

If adding tags to a PDF in Adobe Acrobat results in a tagging structure that is overly complicated or too problematic to fix, you can use the Reading Order tool to remove or replace the current structure. If the document contains mostly text, you can select a page and then remove headings, tables, and other elements to create a cleaner, simpler tagging structure.

Acrobat can retag an already tagged document after you first remove all existing tags from the tree.

Remove all tags from a PDF

Open the Tags panel (View > Show/Hide > Navigation Panels > Tags) and select the root (topmost) tag, Tags.
In the Tags panel, select Delete Tag from the options menu.

Replace the existing tag structure

This procedure works best in pages that contain a single column of text. If the page contains multiple columns, each column must be selected and tagged individually.

Select the tool.
In the document pane, drag to select the entire page. The selection includes both text and nontext elements.
Ctrl-drag around nontext page elements, such as figures and captions, to deselect them until only text is selected on the page. Click Text/Paragraph in the Reading Order dialog box.
In the document pane, select a nontext page element, such as a figure and caption, and click the appropriate button in the dialog box to tag it. Repeat until all page content is tagged.

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