For instance, a PDF in progress can be labeled with stickies containing a viewer's comments, or approved for distribution with an e-signature. Text can be highlighted, crossed-out, and spell checked for errors. There is even a pencil tool so users can actually write on the PDF to point out specific elements to be replaced or edited. If you want to use images from your PDF to put in another document, you can extract them as JPEG, PNG, or TIFF files. While Acrobat provides users with many ways to edit their PDFs, it's also a good idea to restrict access to these features.
Documents can be password protected to prevent unauthorized changes.
Also, invisible signatures can be placed in documents to show who authored them. Acrobat is very simple to use, but we were disappointed with the lack of detailed documentation. We feel the application is friendly enough for users of all levels to figure out, but a nice printed manual would be a great companion. If you are really confused about something in Acrobat, online help is available. Adobe Acrobat enables users to create documents viewable on multiple platforms.