VSDX Annotator is a unique tool, designed to let Mac users open, preview, and annotate Visio drawings. It provides a wide range of annotation possibilities, along with the ability to share visual documents in a multi-platform environment. View Visio drawings as a high-quality image. VSDX Annotator renders drawings and diagrams exactly the same way as they are displayed by MS Visio. VSDX Annotator provides 12 annotation tools. The app allows you to add notes, callouts, comments, blocks, graphic files, etc. Annotate and save VSDX for further editing in Visio. Make changes in the Visio file and export it to PDF.