Here's a frustrating problem: You have InDesign CS4, and your buddy needs your file, but has InDesign CS2. "Easy!" you think, "just save an InDesign Interchange (INX) file and send it to him."

Lo, wonder of wonders: InDesign saves an INX file that's compatible only with the immediately preceding version of InDesign. (As I found out the hard way today.) CS4 saves a file for CS3; CS3 saves a file for CS2. If you don't have both versions on your computer, you're out of luck. Way to Quark it up, Adobe.

An INX file is just a glorified XML file. And Adobe, clever lads and lasses they are, inserted a version number in the file. Adobe CS2 looks at the version number, sees that the INX file is targeted for CS3, and pops up an error message without even trying to open the file. Curses.

But Mike Rankin figured it out last November: Open the INX file with your favorite text editor (like TextMate or BBEdit) and change the version number. Replace line number 2 (which looks like this):

<?aid style="33" type="document" DOMVersion="6.0" readerVersion="5.0" featureSet="257" product="6.0(352)" ?>

with this:

<?aid style="33" type="document" DOMVersion="5.0" readerVersion="4.0" featureSet="257" product="5.0(662)" ?>

Easy peasy. Open the INX file in InDesign CS2, and you're good to go. Use caution, though: This works best for simple layouts. The more complex your layout, the more likely it will unexpectedly change when re-imported into a lesser version of InDesign.

[Via InDesignSecrets.]

The public beta of Gridiron Flow for Mac has been released, and I have to say I'm blown away. I love Curio for project management and brainstorming, but for the nitty gritty of version management, file collection and project source file relationships I'd just as soon have something magically do the job for me. Flow does it quite nicely, at least with Adobe, iWork, Office files and the like. As all-seeing as this software is, it inflicts a remarkably small hit on system resources. Mike Rose filmed a great preview last year, so have a look at that, and at Gridiron's FAQ for Flow, for a better idea of what it does than I could convey here.

The beta is available for download, and currently has no restrictions. I expect Flow to be a costly bit of software, but I haven't been able to track down any price predictions yet (Update, as pointed out by Nicholas in the comments, it's listed -- fairly obviously -- for $249 right now. About what I expected, really ). For now, have a look and dig into automatic versioning, tag-based organization and project visualization that just takes care of itself. It's especially geared toward designers, and will be of the most interest to those who spend their time with InDesign, Illustrator and Photoshop. Personally, I'm hoping I don't get too hooked on it only to find out it's outrageously expensive. Here's hoping for some pocketbook sympathy!

If you're a graphic designer, hopefully you're familiar with WhatTheFont, the essential service from myfonts.com that helps identify a font from a photo or other bitmap image. Now, MyFonts is bringing that power to the iPhone.

With WhatTheFont for iPhone, you can take a picture using the iPhone's camera, and use the WhatTheFont to identify the font in the image. No more guessing -- or even waiting until you get back to the computer. WhatTheFont is even useful to iPod touch users -- the software identifies fonts in images saved from Safari, screenshots, or other images in your photo library.

WhatTheFont requires internet access to work, since it connects with myfonts.com to perform the image analysis. It's free, and available in the App Store.

[Via Swissmiss.]

Gallery: WhatTheFont

TypeDNA is previewing its advanced font management software at Macworld booth 4037, and gave TUAW a sneak peek.

TypeDNA (also the name of the product) is cross-platform, standalone font management software that also includes some advanced features to help you select fonts based on similarity and type features. Along with standard activation and grouping features, TypeDNA includes Font Harmony and Similar Fonts tools to help you select aesthetically-compatible fonts for your projects.

TypeDNA will begin a public beta program soon, with an eye to releasing the software in March. If you want to sign up for TypeDNA's public beta, you can.

If you've always wondered how to draw a "ball of nodes" as featured in a variety of Mac OS X icons, wonder no more: Mike Rundle of flyosity.com has written a tutorial to show you how using Photoshop.

Rundle discusses "spheric realism," the process of understanding the materials, reflectivity, and roundness of a sphere, and how to accurately illustrate it digitally.

Clever users can easily adapt the technique for Illustrator, Acorn, or many other compositing tools that feature blur and blending mode support.

Rundle also offers a PSD file containing the artwork with no strings attached.

Thanks Todd!

Although many TUAW contests are limited to North American participants, here's a contest sponsored by a Belgian Mac development firm that is open to everybody!

Creaceed's Hydra 1.6 software is a Leopard-only solution for creating HDR (High Dynamic Range) photographs. If you're not familiar with HDR photography, it's a way of creating photographs that are closer to what the human eye actually sees (view Flickr gallery). To do this, you take two or more photos of the same scene; some are overexposed, some underexposed, some are just right.

For example, if you see a beautiful sunset with your own eyes, you can see details in both the sunset and the surrounding landscape. Since digital camera CCDs don't have the same dynamic range as your eyes, photos of the sunset usually show the landscape as being too dark. If you get the landscape "right", the sunset is washed out.

Hydra takes those photographs, aligns them, and then performs some algorithmic magic to create HDR images that are perfectly exposed across the entire photograph.

If you got a new digital camera for Christmas, give Hydra a try, and then enter your best HDR images into Creaceed's contest. Entry details can be found here -- good luck!