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Easily convert any document that prints to PDF to preserve formatting and ensure document integrity.Manage electronic document reviews Gain the input you need through interactive, shared document reviews that help participants see and build on other reviewers' comments. Comments can be sorted by author, date, or page. Easily review documents Use familiar commenting tools such as sticky notes, a highlighter, and stamps to provide feedback. Help protect attached files Enhanced Help protect all the documents attached to your PDF file with 256-bit encryption. Sign documents digitally Apply digital signatures to authenticate documents, manage their status, and help protect against unauthorized modification. Certify PDF documents Use digital IDs to certify documents, signifying that they came from a trusted source. Remove hidden data Inspect PDF documents for metadata, hidden layers, and other concealed information, and remove before distributing to others. Save passwords and permissions as security policies that can be easily applied to new PDF files. Use permissions to restrict printing, copying, or altering. Help protect data with passwords and permissions Use passwords to help control access to PDF documents. Help secure PDF documents New Help protect PDF documents with 256-bit encryption. Attach native files Share source files by including documents in their original, native format. Unify with headers, footers, and watermarks Automatically remove headers and footers from source files and add unifying headers, footers, or watermarks to your merged PDF file. Optimize PDF output Select from multiple file size and quality settings to optimize PDF output for your intended purpose. Include only the pages you need Specify which pages, layouts, or sheets should be included from source files in your final, merged PDF file. Combine content in a single PDF file Assemble documents, spreadsheets, presentations, e-mail, and web pages in a single compressed PDF file to easily share with others.