How do I disable Autosave in Preview?
I find Preview is altering my PDF files, autosaving "changes" when I rotate my view etc. I have already chosen "Ask to keep changes when closing documents" in system preferences. When I quit Preview and choose to revert changes, the file date on my PDF file is changed anyway. How do I disable this auto-save feature in Yosemite?
Thanks
MacBook Pro (15-inch Early 2011), OS X Yosemite (10.10.4)