You can use the macOS Finder's Copy command to copy and paste files. But here's how to use the same command to copy file icons into Preview. You've probably used the macOS Finder's popup contextual ...
Right-click the DriveIcon folder on the left side and choose New > Key, then name the new key after the drive letter you want ...
Most Mac users will be familiar with Finder's ability to display icon previews for file types that it recognizes. The Finder icon for a JPEG image for example will show a small thumbnail-sized version ...