Have you ever noticed how freaked out relatives get when you email them high-res photos from your six- or eight-meg digital camera? For example, your grandmother in Minnesota may not have Photoshop CS2, and so dealing with that 26MB, 41-inch-wide photo you shot with your eight-meg camera might put a strain on her system. That’s why you might want to reduce the size of those photos you’re about to email. You don’t even have to launch Photoshop — because you can do the resizing right within Mail.
After you attach a photo to your email message (you can just drag-and-drop the image into the New Message window), take a look in the bottom-right corner of your email message window, and you’ll see a pop-up menu where you can choose the Image Size you’d like to send. As soon as you choose a size (other than Actual Size), the image is immediately scaled down right within the email message window so you can see the exact size of the photo you’re sending.
Let’s say you’re reading an article online, and you read a sentence that you want to email to a friend. Don’t do the copy-and-paste thing. Instead, just highlight the text and drag-and-drop it right on the Mail icon in the Dock. It will open Mail and put that sentence into a new mail message. This tip also works in other Cocoa applications like TextEdit, Stickies, and Safari. For example, if you’re reading a story and want to do a Google search on something you’ve read, just highlight the text and drag-and-drop it on the Safari icon in the Dock. It will launch Safari and display the Google Search Results."
An even faster technique: Right-click (or Control-click) on the highlighted text, and from the pop-up window, choose Search in Google. OSX.4.11
In Leopard, your Address Book doesn’t just tell you where to go—it shows you!
To get an instant map to any address, just control-click on the address field of a contact card (or right-click if you have a two-button mouse). Then select Map Of.
Originally Posted by Apple
This command opens Safari (if it’s not already open) and reveals the address in Google Maps.
Originally Posted by Apple
This trick isn’t just confined to Address Book: Leopard can detect street addresses within Mail as well. When your cursor hovers over a street address in an email, a dotted rectangle surrounds it and a small gray triangle appears. Click on the triangle and select Show Map... to see the address in Google Maps.
Here's a tip similar to the Leopard Exposé bit but works all the way back to Panther. I use it routinely but many are unfamiliar with it.
Command Tab will show all open applications and highlight the active app. Keep the command (Apple) held down and press Tab to switch through the open applications. Way easier than dock diving.
BTW the second step works all the way back to OS7 and maybe even a bit earlier.
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Using OneStep DVD
Sometimes when you might not want to design a DVD from scratch. Maybe you have footage in your camcorder that you want transferred to DVD quickly—like a play rehearsal that you want to share with the cast, or a sports event the coaches need to review, or a movie on tape that you’ve already edited.
With OneStep DVD, you can copy the footage straight from the tape in your camcorder (or from your hard disk) to a DVD that will play your video footage as a single movie.
Using a Penryn MacBook Pro, or presumably a MacBook Air also:
in QuickTime, try the two finger swipe back and forth horizontally to fast play back and forward, and the three finger swipe to toggle start/where you left off. Pinch and expand for window/full screen modes.