This week I’m going to talk about a bug workaround and then give you a tip for using the Tint wheels. Recently I’ve been getting occasional black previews on images that had been successfully transferred from the CF card. Initially the previews were fine. Then after I work on the image in the Adjustment HUD, suddenly the thumbnail preview becomes black. Sometimes the larger preview in the Viewer remains, and sometimes it turns black as well. It’s annoying and frustrating, but not deadly. All you need to do is click on the New Image from Master icon (or go to Images >New Version From Master in the Menu bar) and a new version is created complete with a preview. To copy the adjustments you made to the original file, use the Lift and Stamp tools. So far I’ve not had any trouble with that corrupting the new version. Hopefully Apple will fix this bug soon.
Now here’s the tip. The tint wheels in the Adjustment HUD are useful to make subtle separate adjustments to the colorcast of the shadows, midtones, or highlights. Sometimes people hesitate to use the Tint wheels because there is no obvious way to reset them individually. However if you double click inside the tiny circle - the part that you drag to set the colorcast - it will snap back to the center of the wheel. You can think of it as a pseudo joystick that you drag to the desired position. Then to return to center, just double click.