The Reading Order panel allows you to specify the order in which assistive technologies, such as screen readers, will present your document's contents to the reader.

The panel automatically lists text objects from all pages of your document, and any other objects for which you have set alt text using the Tags panel.
Items can be reordered by dragging them up or down the list. They can be grouped into articles to help you more easily manage the reading order.
Items are named according to the following rules:
1 This occurs when an object is manually added to the reading order. You'll need to add alt text for the item to be included in an exported PDF's reading order.
2 To rename an article, select it, then click it again.
The following items are available on the panel: