Improving support for OS X 10.9 Mavericks, Ergonis Software has released PopChar X 6.4 with an improved “corner P” that appears on the active screen on all monitors in a multi-monitor configuration and fixes several other display issues with Mavericks. The font discovery utility also improves its responsiveness in several areas, with the update quickening the pace of displaying the character table, improving the speed of detecting the font in the current application, reducing background activity by reloading available fonts only when necessary, and remembering the previously selected font separately for each application. (€29.99 new with a 25 percent discount for TidBITS members, free update, 3.7 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-]).