Lemkesoft has released GraphicConverter 9.2, which now includes a new feature that regularly verifies images on NAS devices (via a background task). The graphic conversion and editing utility gains sharpen, burn, and dodge brushes, an export to Apple TV that keeps file order, display of animated GIFs during slideshow, the capability to access tools in new submenu, and a golden ratio display. The update also optimizes the speed of PDF multipage editing if ZIP or JPEG compression is used, improves rename options, fixes a bug when saving GIF loop values, and improves batch multiscale options. ($39.95 new from the Lemkesoft Web site or from the Mac App Store, 228 MB, release notes, 10.7+).
Go Back and Forth Fast in Preview
If you're reading a PDF in Apple's Preview software, and you follow a bookmark or an internal link to move around within the PDF, you can quickly return to where you were by pressing the keyboard shortcut Command-[ (that's Command-Left Bracket). Or, you can choose Go > Back.
The command works iteratively, so you can go back to just the previously viewed page or if you issue the command again, to the page before that, and so on. There's also an equivalent Go > Forward (Command-]).