I'm developing a document editor for macOS using AppKit, which supports structured content such as titles and multiple heading levels—similar to what you see in the Pages app.
I'm looking for a way to programmatically mark a specific substring within an NSTextView as a heading, so that VoiceOver can recognize it and announce it appropriately (e.g., by saying “heading” before reading the text). This would be similar in spirit to how NSAccessibilityLinkTextAttribute works for links.
Is there an existing accessibility text attribute or recommended approach to achieve this behavior for headings? If not, I’d appreciate any guidance or suggestions on how best to implement this in a VoiceOver-friendly way.
Thank you in advance for your help!
Best regards,