PDF Explained

解释PDF格式标准.Atlast,here’sanapproachableintroductiontothewidelyusedPortableDocumentFormat.PDFsareeverywhere,bothonlineandinprintedform,butfewpeopletakeadvantageoftheusefulfeaturesorgraspthenuancesofthisformat.Thisconcisebookprovidesahands-ontouroftheworld’sleadingpage-descriptionlangua