how to show author column in document properties for pdf

Hi,

I save all document of PDF in one folder.  Then i click choose details i choose 'Author'

i need to add name in the author column and showed the author name in document properties.

so i open the pdf file ---- properties -- at description (key name at author column) then save it.

BUT , when i back into the list of document, it doesnt show author name . it only showed Name, date modified, type, size. and blank info under author.

Please advise . thank you.

Myra