Generating icons for display as thumbnails, and previews of documents, depend on speed of delivery and icons as faithful as possible for their size. How QuickLook achieves this in Tahoe.
Preview
From the first image thumbnails around 35 years ago, the Mac has delivered better thumbnails and previews of documents, most recently using QuickLook. Here’s how it works, and how it can fail.
Version support built into macOS doesn’t preserve versions as well as it could. Here’s how to use Versatility to ensure you don’t lose versions in iCloud, moving a file, or backing up.
Why can’t some files be seen in thumbnails, or previews, but almost everything else can be seen thanks to QuickLook? And is this connected to Spotlight indexing?
Preview offers PDF/A as an export option, intended for PDFs that are to be relied on long into the future, for archives. Do they comply with one of the PDF/A standards, though?
Two confounding factors to take into account when interpreting timestamps on files: what updates the Last opened time, and access via QuickLook.
Without you saving any changes made to a document, Preview saves versions in the macOS versioning system that could prove a great help. Here’s how to use it.
Annotations are complicated. If you’re not careful, hidden annotations can be left in documents and cause embarrassment. And how to recover a PDF that Preview has mutilated.
Adobe’s Carousel reader came in 1993, and in Mac OS X PDF was built into its Quartz graphics. That enabled Preview to become the claimed ‘fastest PDF viewer on the planet’.
How to discover which QuickLook generator or app extension should be creating Thumbnails or Previews for different file types, using this new version of Mints.
The Eclectic Light Company 