Thoughtful, detailed coverage of the Mac, iPhone, and iPad, plus the best-selling Take Control ebooks.



Pick an apple! 
iMovie '09: Speed Clips up to 2,000%

iMovie '09 brings back the capability to speed up or slow down clips, which went missing in iMovie '08. Select a clip and bring up the Clip Inspector by double-clicking the clip, clicking the Inspector button on the toolbar, or pressing the I key. Just as with its last appearance in iMovie HD 6, you can move a slider to make the video play back slower or faster (indicated by a turtle or hare icon).

You can also enter a value into the text field to the right of the slider, and this is where things get interesting. You're not limited to the tick mark values on the slider, so you can set the speed to be 118% of normal if you want. The field below that tells you the clip's changed duration.

But you can also exceed the boundaries of the speed slider. Enter any number between 5% and 2000%, then click Done.

Visit iMovie '09 Visual QuickStart Guide


Mathematical Art from a Mac

Send Article to a Friend

The cover of the journal Science for 22-Sep-06 features a beautiful artwork titled "Still Life: Five Glass Surfaces on a Tabletop" by graphic artist Luc Benard and mathematician Richard Palais, but the image is neither a photograph nor a Photoshop illustration. Instead, the five objects pictured are famous mathematical surfaces produced by the free Macintosh program 3D-XplorMath. The objects were then exported into Bryce, a 3D-rendering program, where Luc Benard gave them a glassy texture and placed them on a virtual glass-covered wooden tabletop.

The image is the first-place winner in the illustration category of the 2006 Science and Engineering Visualization Challenge, jointly sponsored by Science and the National Science Foundation.

Richard Palais, a well-known professor of mathematics at the University of California, Irvine, has worked on the mathematical visualization program 3D-XplorMath (previously known as 3D-Filmstrip) since 1997. Users can view a gallery of interesting mathematical objects in it, plus modify various parameters and viewing options for further experimentation. 3D-XplorMath runs in Mac OS 9 and Mac OS X as a Carbon application and is a free 12.3 MB download.


Updated! PDFpen for iPad 1.7: Designed for iOS 7, faster, and
better-looking. Edit your PDFs anywhere. Sign contracts, make
changes, fill forms, and more. All while you’re on the move.
Syncs via iCloud and Dropbox. <>