Over the weekend I messed around with the newest version of iPhoto and I should say right off, it’s Luddite friendly but tech-nut technical if you digg. Do you digg?
This log is about light levels, specifically how much an image is exposed to. In iPhoto the the mechanism we use to manipulate these levels is aptly named “Levels.” In an earlier version of iPhoto the same mechanism was called the “Histogram.” I thought it might be useful to trace their name reasoning:
Histogram is statistical terminology for “a graphical display of tabulated frequencies.” This is important because to ensure accurate measurements the light levels that any one of your photographs has been exposed to is displayed as a graphical display of tabulated frequencies. And the best part? You can manipulate this graphical display of tabulated frequencies. Okay.. that’s that last time, I swear. graphicaldisplayoftabulatedfrequencies. Oops.
Ok let’s fire up iPhoto. Let’s say that we’ve already uploaded some photos of a lake. A really perfect lake that we like to play on. Unfortunately not everyone can be there so we take some pictures. Those are the pictures we’ve uploaded already. iPhoto does us a favor and automatically sorts them based on the date they were TAKEN. Not the date they were uploaded.
*this is a default setting that cannot be changed. There are some minor adjustments that you can make, like the amount of time between each event. i.e. 1 event per day or 1 event per week. you can find these adjustments in preferences/events/autosplit.
We can see three different events. Each is dated and perhaps named. Hold on a minute.. there is only one picture per event. What is this tomfoolery? This is your “Key Photo.” A photo, of your choosing, that represents the event.

key photos can be changed to best represent the event
Now Apple did something kind of cool with this event tab. If you mouse over any of the key photos and then slowly slide your cursor over that image, iPhoto will cycle through all the photographs in that event. There isn’t much utility to this function (in my opinion) but if you want a quick glimpse at a group of photos this is a nice way to do that. What we want is the “Photos” tab, just below “Events.” Click that and this is what you’ll see,

a good graphical organizer, yellow boxed pics = highlighted
Now in my image you can see that the individual pictures are quite small. This can be changed at the bottom right of the screen. Just move that slider to the right. So we’ve all our images loaded and we see some that came out just terribly. All washed out, too dark, far too much red eye. I know I don’t like demons in my Christmas photos. All these images that we would normally, “command + delete” are salvageable.
Let’s choose a picture. I’ve decided on one that turned out pretty well, but I’m going to manipulate its levels anyway.

skyline, with a messy foreground that I think I'd like much darker
The image is a bit small on this log so if you’d like a closer look click the picture. At the bottom of the screen you can see a small icon “Edit.” Once selected this will change our options a little bit.
The two semi-transparent screens become available if you choose the center-most of the options on the footer, “Effects” and “Adjust.” Adjust is the one we want.
LEVELS! here we are. As you can see by the graphical display of tabulated frequencies. hehe. This is all the light our picture was exposed to when taken. It is quite a dark picture, most of the light comes from the top half of the picture which renders the street below hidden.
For the purposes of this tutorial, we’re going to say we really want to see that street. That is the focus of this photograph, not that picturesque skyline or vibrant sunset!
Normally, I would give an detailed play-by-play of how to make your picture use the best light. But in this case, playing is only way to learn. Grab your cursor and pull those left and right triangles in and out. Moving the right triangle inward will expose it to more light. Moving the left-most triangle in ward will make it darker. Moving the center closer to the right triangle with constrain the amount of light the image gets and vice versa.

event images get organized linearly on header, options expand on footer
Levels is an incredibly useful tool. I would issue one caution. Sometimes what’s in a picture is its rawness. The moment when the shutter snaped. Use levels to recover, clean up, restore but don’t get obsesed with changing every photo. It’s time consuming and many times the minor changes you’ll make will be so minor, they will have little effect on how the photograph is received.
I mentioned “Effects” earlier. Click that. iPhoto will give you a seemingly limited selection of alterations you can make. Namely, “black and white; sepia; antique; fade color; boost color; matte; vignette; edge blur;” and most importantly, “original.”
*Another really useful and largely unnoticed element of iPhoto is the “revert to original” action. iPhoto automatically saves the original image as default setting when you import you photos (you can turn this setting off to save disk space). This way you can change an image all you want and in the end when you realize that what’s in an image is the rawness of the shutter snapping, you can simply choose “photos” in the iPhoto menu then “rever to original” (have the image selected of course). It may even be possible to batch revert a group by selecting them all at once.
I say “seemingly limited selection…” because once you choose one of the effects listed you can then make fine adjustments to that effect by clicking the left and right arrows that prompt you.
i see a timberland shoe symbol and an Australian skyline
For the casual photographer iPhoto does everything Photoshop can do at a fraction the price. It is an organizer first and an editor second but this doesn’t make it any less powerful a program. There are even a few things that it can do better than Photoshop.. like red-eye remover. It’s such a simple process that I won’t devote a tutorial to it. Simply click “red-eye” then click the red eye.
Happy hunting friends.