Ergonis has released KeyCue 6.3, which adds compatibility with OS X 10.8 Mountain Lion to the keyboard shortcut utility and ensures that KeyCue’s new technique for adding the app to the Login Items list now works with the big cat. The update also fixes an issue that caused group titles to appear white on white while editing custom shortcuts, improves the Start at Login setting when KeyCue has been renamed, and plays the Installer’s completion sound through the “sound effects” channel while respecting the volume level set in System Preferences. (€19.99 new with a 25-percent discount for TidBITS members, free update, 2.2 MB, release notes)
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-]).