Pushing to get one last significant update in before Apple restricts the Mac App Store to apps that can be sandboxed, Stairways Software has released Keyboard Maestro 5.3 with a number of image manipulation and mouse click actions added to the powerful automation utility. On the image front, Keyboard Maestro 5.3 now enables you to create new images; flip, rotate, resize, and crop images; create images out of composites of images, styled text, and shapes; find an image on your screen; and capture one or all screens or a selected window. Enhanced mouse click actions include support for double and triple clicks, dragging with any button, and clicking relative to the center of a window, screen, or image. You can also now type the word APPLICATION (in all caps) within menu selections as an alias for the current application. Other additions include a new Highlight Location action and live reporting of condition test results in action editors. A number of tweaky bug fixes round out the update. ($36 new, free update, $25 upgrade from versions previous to 5.0, 17.5 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-]).