adjustment

Feature #9 is my favorite adjustment command: Levels. Adjusted only slightly since its introduction in Version 1.0, this seminal feature lets you set the black and white points, as well as correct the midtones without harming either. It refrains from clipping colors unless you tell it to. It boasts Photoshop's first on-board histogram. And it works as well in CMYK and Lab as in RGB.

(Well there's another clue for you all.)

We had nearly twice as many entries last week as the week before, with 19 of you correctly guessing Levels or some variation. The winner is earthrat, whose guessed "Using Levels to work." Congrats to earthrat!

Now it's time to guess Feature #8. Hint: It's the ultimate convenience tool. All members have been sent an email invitation with a URL to enter the contest. (No direct URL this time around.) Join dekeOnline now to receive a reminder and an invitation to next week's contest!
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It's difficult (verging on impossible) to exaggerate the importance of color adjustments in Photoshop. In the 19+ years I've been using the program, I don't think I've come across a single image that I haven't adjusted to some degree or other. And while there's no single best command for adjusting colors (Feature #28: Hue/Saturation for one image, Feature #24: Curves for another), there is a best method: adjustment layers.

An adjustment layer is an independent layer of color adjustment that you can edit any time you like. Plus it affects all layers below it, consumes very little space in memory, and affords you the opportunity to make selective edits. In other words, it's small and nondestructive. (Compare this to Feature #18: Smart Objects, which is huge and nondestructive.) The modest adjustment layer is also relatively easy to use--by Photoshop standards, anyway. Read more » 

Were I inclined to be purely objective, I would tell you that the ages-old Hue/Saturation command is growing somewhat long in the tooth. For example, if your primary purpose is to increase the saturation of an image, you're better off exploiting the Vibrance command or the Lab mode.

Even so, Hue/Saturation continues to do something that no other feature does: It lets you edit one range of colors independently of all others--without defining a selection or mask--all from inside a single dialog box or palette. And it does this so very easily and so very credibly, that you can get in and out of an image without anyone being the wiser. Read more »