PDF88 is SoHo Dragon's PDF markup tool. It is a professional PDF editor that works within SharePoint, MS Teams, and OneDrive. It features a simple, intuitive interface and easy-to-use functions at a reasonable cost. The tool lets you edit and annotate images, forms, and PDFs, and supports digital signature (eSignature) as well as conversion to OCR and CAD formats. And it supports concurrent editing, so more than one person can edit a document at the same time.