If you plan to export your document to a tagged PDF or to XML, you can include object attribute information for your anchored frames.
The document should contain written descriptions of graphic objects in the document, including drop caps. These graphic objects must be in anchored frames. When a screen reader encounters the graphic in the document, it will read the alternate text. Make sure you use text that makes sense when read out of context. For example, you might want to add alternative text that begins with "A graphic depicting" and then describe what the graphic depicts.
Alt text is different than graphics or standard text. Alt text is typically used for describing an image so that screen readers can read it aloud. Actual text is for reading aloud the actual text, as in the case of a drop cap. For example, if the author is using a drop cap for the letter A in the word "Adobe" but still wants the screen readers to read the word as "Adobe" and not as "dobe," this can be done by filling in actual text. The attribute will be saved to alt text and actual text in tagged PDF and XML.
When you provide an alternate text attribute on an anchored frame, the corresponding figure elements in PDF and graphic elements in XML get an "alt text" attribute.The Actual Text attribute is processed only for tagged PDF. XML export ignores this attribute.
Note: Object attributes support the Unicode text encoding standard.