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Select the Layers button in the navigation pane

PDF/A-2 included the following features as part of this new standardPDF/A-2 comes with the support of JPEG2000 that is helpful in case of scanned documents

It supports embedding of PDF/A collections that can be used to created a container PDF having other similar files It supports transparency feature of PDF files in totality as compared to PDF/A-1 where it was partially supportedPDF/A-2 provides the support for optional content that is useful for mapping applications and engineering drawingsThese are also known as layers that can be made visible or hidden as per the requirements of viewing person

It specifies the requirements for custom XMP metadata Adds some of the newer comment types to the list of prohibited annotation typesIn addition, some of the newer comment types such as text editing comments were added to the list of acceptable items

PDF/A-3 PDF/A-3 includes all the conformance requirements of Level 2 and allows embedding of additional file formats (such as XML, CSV, CAD, word-processing , spreadsheet and others) into the PDF/A conforming documents

What is PDF/E? The “E” in PDF/E stands for EngineeringChoose File > Properties, click the Initial View tab, choose Attachments Panel And Page from the Navigation Tab menu, and click OK

Save the PDF(Optional) To add a description to the attachment that helps differentiate between similar files in the Attachments panel, select the attached file, and from the options menu , choose Edit Description

Edit the text of the description, and then save the fileOpen, save, or delete an attachment You can open a PDF attachment and make changes to it—if you have permissions—and your changes are applied to the PDF attachment