When I open pdf documents they appear yellow.
I found solution to do to edit, prefrences, change view to windows
and document is now back to being white.
Then i reopen document and it is back to yellow.
I changed prefrences with document open and document closed (just adobe opened)
Had adobe open as administartor and still does not save when i reopen.
btw i have latest adobe version.
and
I deleted the entire DC folder from %APPDATA%\Adobe\Acrobat and rebooted the pc. To forced it to purge corrupted settings for Adobe and made Adobe rebuild the settings from scratch.
still prefrences are not saved after i reopen documents
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