I have recently received a pdf file that, although previously opened, now shows totally blacked out? What can I do to correct this?

Hi rdfnra,

Please check the Page Display preferences (File > Preferences/Acrobat > Preferences) and make sure that Show Large Images is selected. If sounds as though this PDF may have been created from a scanned document, and this preference is disabled.

Please let us know how it goes.

Best,

Sara