Mobile Browser Commenting: You can add comments to shared prototypes on an Android or iOS mobile device using mobile browser in portrait mode.
Unified Shared Links for Prototypes and Design Specs: When you open a design spec that was shared with you using share for development workflow, you can view the shared spec in prototype mode.
Grid view in shared links: The UX flow view design specs has been replaced by the all new and efficiently navigable grid view in Adobe XD. Grid view in prototypes and design specs makes it easier for your stakeholders or developers to quickly navigate to the most relevant artboard.
Cloud document presence: To avoid conflicting edits and effort duplication on a cloud document, XD introduces a visual indicator that indicates when other designers are collaborating on the same cloud document. Designers can view a profile avatar of other designers working on the document.
Subscript/superscript for Design Specs: In design specs, you can now view and inspect specifications for a subset of text within a larger text of an artboard.