In iTunes 10, if you select multiple speakers with the new AirPlay feature iTunes will allow you to fine tune the output volume of each speaker.

If you are struggling with the new low-contrast icons in iTunes 10, here is a hint to change the appearance.

In the terminal enter:

defaults write com.apple.iTunes high-contrast-mode-enable -bool TRUE

This will give a high-contrast side bar and listing pane. To undo this repeat the command but change the TRUE to FALSE. I haven't managed to get the color icons back yet though.

The preference AppleAquaColorVariant is next in the list after high-contrast-mode-enable and also does something, unfortunately every value I've tried so far prevents iTunes from launching. If you want to experiment, you can remove it to fix iTunes with:

defaults delete com.apple.iTunes AppleAquaColorVariant

[crarko adds: I tried this, and what it does is go from black on white to white on black. That certainly is higher contrast but I don't know how appealing that will be. I may try it for a while. If anyone has success with the AppleAquaColorVariant setting please submit a hint about it. That would seem to be a more desirable change.]

If you're a frequent user of Spaces, you'll often find yourself moving windows between spaces, however, if you like to have your large windows properly centered (e.g. in Safari or other browsers) you'll find it difficult to properly center the window when moving between spaces, leaving part of the window off-screen, and needing to be adjusted.

The solution is simple, all you have to do is enter Exposé from the spaces overview, and then move the windows between spaces. Once you exit Exposé, you'll find the window will be in the exact same location on the screen it was in the previous space.

[crarko adds: I tested this, and it works as described. On my MacBook I just used the default keyboard settings of F8 to get into the Spaces overview, and then F9 to bring up Exposé in 'All windows' mode. If you've changed those key bindings, use your correct ones, or you could combine the two using this hint.]

It's the Labor Day holiday in the U.S. today. We'll be back tomorrow with some more iTunes 10 hints, while awaiting the iOS 4.1 and Mac OS X 10.6.5 updates.

As has been already reported in Macworld, Automator actions that talk to iTunes all broke upon the release of iTunes 10.0. This is because each action specifies in a text string in its Info.plist file that it requires iTunes version 4.6 or higher, and alphabetically, '10.0' is smaller than '4.6.' I frequently use 'Add to iTunes as a Spoken Track' (activated in System Preferences » Keyboard » Services). Here is how I got it working again.

iTunes 10 includes a QuickTime X-like controller available right from the album art!

I was playing around with iTunes 10 today and happened to click on the album art in the Now Playing section (lower left corner) and the album art window popped up full-size like normal. I noticed that there wasn't a title bar and alas, there was a controller, just like the one on QuickTime X videos, that you can use to play/pause, skip, scrub, fast forward, rewind, and change the volume of the track! So now there's one additional way to control your music in addition to the mini player. I'm not sure if this is a Snow-Leopard only thing, but it's very nice.

[crarko adds: I tested this, and it works as described. Was this available in 9.2.1 on Snow Leopard? I never use the Now Playing drawer in iTunes so I didn't notice if it was or not. I looked on Leopard and it wasn't there in 9.2.1. How about in iTunes 10 on Leopard? I doubt it, since it looks like it uses QuickTime X. ]

In iTunes 10, Apple has removed the filter/search field from the Sync Apps window for an attached device. The text field allowed you to search for a string and filter your list of apps like in Spotlight. It's not really missing; it has just been replaced.

Just like in any iTunes window -- whether browsing the App Store, Music Store, etc. -- the universal Search field in the upper right can now be used to filter/search through your own apps in the Sync Apps list.

[crarko adds: I tested this, and it works as described.]

A lot of people find the new iTunes 10 icon unattractive and out of place. This hint goes well together with other hints about restoring what was preferred about iTunes 9.

This simple trick will restore your old iTunes icon (or you can replace it with another of your choice), and will work for any other app as well.

The iTunes Classic Visualizer is great. For starters, it keeps you interested, and it seems uncannily good at matching the mood of the visuals to the style of music. The new Visualizer style just doesn't make sense to me -- pulsating orbs?

Anyway, the problem with the Classic Visualizer is that it would always force a low resolution on you when using full screen mode.

I'm happy to point out that the Classic Visualizer in iTunes 10 now uses your current display resolution when you go into full screen mode. Now it looks absolutely awesome on a nice 720p/1080p TV set. Unfortunately it still blanks secondary displays in full screen mode.

I know I'm not the only one to have searched for an answer to this, only to be disappointed with the 'Use screen zoom' solution that's been around for years.

[crarko adds: I tested this, and it works as described, although I didn't try the external output. Thanks to Tom Karpik for this hint.]

iTunes 10 provides a different layout for the Close, Minimize and Maximize buttons. Instead of being ordered horizontally, in iTunes 10 they're arranged vertically, like a traffic light.