Adobe Systems Inc. announced the latest version of Acrobat. Acrobat 4.0 adds a new set of annotation and security tools for transforming and conveying documents written in different formats. The new Adobe PDFMaker utility also lets users convert Microsoft Word, Excel, and PowerPoint files from within those applications. Acrobat 4.0 captures Web pages or entire Web sites and turns them into fully formatted PDF files. The application also can secure files through a certificate system that validates users’ identities. 4.0 will ship in the second half of the year, at $249. Users can upgrade from earlier versions for $99.