Drawing a Half-Circle Highlight in Keynote

Deke figures out how to draw a semi-circle to highlight a key element of a keynote slide.

Deke's Techniques 021: Creating a High Key High Contrast Effect in Photoshop

This week I show you how to turn an untreated studio photograph into a high key, high contrast image with ultra-black shadows but nary a clipped highlight.

Deke's Techniques 019: Masking Highlights and Shadows in Photoshop

This week's 7-minute video shows you how to isolate the highlights and shadows from one image and blend them with those of another. It's quick, easy, and effective.

Photoshop CS5 One-on-One: Advanced Goes Live

Photoshop Top 40, Feature #9: Levels

The Levels command, and its cohort the histogram, let you adjust luminance levels on a channel-by-channel basis. The upshot is that you can increase contrast, correct for color cast, and make a bad image good.

Photoshop Top 40, Feature #26: Dodge and Burn

Photoshop offers two tools that paint with luminance: The dodge tool paints in brightness, the burn tool paints in darkness. They're crazy useful, and they've gotten so much better in Photoshop CS4.