Windows metadata tag
The Windows properties metadata tag though not used by Adobe PDF cannot be added or changed. For other files as .jpg, MS Office this field is available in Windows Explorer and can be edited. I wish Adobe do the same with PDF in order to allow files to be searched by tags.
Hot Rolled commented
I wish the same. I often wish the 'comments' 'subject', etc fields could be added in file explorer. since this isn't allowed, pdf filenames become unusually large and confusing.
Sajit Viswan commented
The Windows file system has a property attribute for all types of files, called tags. This is enabled and allows the user to edit for .jpg, MS office files and some others. For PDF this attribute 'tag' is not used by Adobe within the acrobat. Adobe and Microsoft should get together and spare PC users by allowing to edit this tag for PDF files. This will allow searches through Windows files and directories and help users find what they are looking for. Finds will be more productive than having to create sub folders for everything and then ending with the Windows physical limits of the 254 Char of file name and folders together.
Surprising no one at Adobe has had the time to look at my suggestion until now.