More Mac 101, TUAW's series for beginners. My mom called me up last week with this question about Mail: "Where did my send button go?"

Turns out she had mistakenly clicked the white chiclet (pictured) in the upper-right hand corner of her message's compose window, hiding her toolbar. When she clicked it once, Mail remembered her settings and hid the toolbar for other message windows, too.

So, just clicking that chiclet showed the toolbar again, and brought her send button back. Magic.

Also, you can hold down command and click the same chiclet to show and hide icons and text labels in the toolbar. Repeatedly clicking with the command key held down cycles through all your options.

Now that my mom is happily sending emails again, I can sleep well knowing all about the new Bob's Big Boy and the local woman who was on Survivor.

When Apple first introduced the iPhone, they also announced a new set of earbuds to go along with it. These headphones sport a nice clicky button that allows you to pause/play/skip a song. However, they forgot to include a function to go to a previous song.

If you are running the new 2.1 firmware, you are now able to triple-click the friendly button on your headphones to go to a previous song.

We here at TUAW understand that the feat of creating a single button that serves four purposes is not an easy one. Therefore, join us in giving Apple a quick, but much needed round of applause for finally adding this feature.

Want more iPhone tips like this? Visit TUAW's iPhone 101 section.

IntoMobile has a few good tips on how to extend your iPhone's battery life, and most of them involve the most obvious thing you can do to keep your iPhone running: cut down on any and all extra functions. They actually recommend to turn off 3G, but you don't have to go that far -- just by holding down the Home button, you can close any background applications sucking up juice. And by resetting your phone, you can do the same thing -- clear out anything running that you're not using.

Actually, while I was in Los Angeles last week, I heard the great Leo Laporte mention a great tip on his radio show: turn off the "Ask to join networks" feature in the WiFi settings. If you're like me, you almost always know when there's a WiFi network around that you can use on your iPhone, and so it's pointless (and a waste of battery life) for the iPhone to be constantly searching for one. You can always flip it back on if you do want to do a little poking around, but leaving it off will significantly help battery life.

In fact, when in extreme trouble, you can go even farther and just switch the whole thing into Airplane Mode. It'll make your phone useless, but when you really need it -- out on a trip, or waiting to make an important call -- the extra battery time might make all the difference.

[via Apple Enthusiast]

The iPhone offers many ways to send mail. Unfortunately, consistency is not the strong point here. You'd imagine Apple would have designed a single universally recognized "compose email" button and placed it more-or-less in the same place for each application. You'd be wrong. Here's a quick run-down of several extremely different ways to create a new message across several programs:

• Compose Button. The compose button, which looks like a square with a pencil through it, appears at the bottom right of many Mail screens and in the SMS Text application at the top-right of the screen. The Reply/Forward button appears just to the left of the Compose icon in Mail. Tap this to reply to a message or forward it on to another party.
• Envelope Icon. In the Notes application, the envelope icon appears on the bottom of the page, to the left of the garbage can. Tap it to email the current note.
• Use-For Icon. The use-photo-for icon appears at the bottom left of the screen. It looks like a rectangle with an arrow jumping out of it-the arrow is basically a mirror of the Reply/Forward button. Tap this and select Email Photo from the pop-up menu.
• Share. You can share YouTube video and Safari URLs by email. Tap the Share button on the Information page in YouTube and in the navigate-to-URL screen in Safari. To find this in YouTube, tap the blue reveal button located to the right of the video name. In Safari, tap on the URL bar and then look up and to the left.

So why so many ways to do what is essentially the same task? This inconsistent design speaks volumes to me about rushing the iPhone to market. It's as if the different groups simply didn't have time to communicate with each other and standardize the way they do what is truly a core task with consistent icons and naming. What do you think? Let me know in the comments.