Adobe Photoshop CC 2014 v.14.xx - Manual (Page 204)

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Preview Stop Size
Relative to Document
To the top
Sets the stop increments for each preview swatch. For example, a setting of 3 results in swatches of -9, -6, -3, +3, +6,
+9. These swatches let you preview the appearance of your selected color at different exposure settings.
Select to adjust the preview swatches to reflect the current exposure setting for the image. For example, if the
document exposure is set higher, the new preview swatch will be lighter than the color selected in the Color Picker’s color field, to show the
effect of the higher exposure on the selected color. If the current exposure is set to 0 (the default), checking or unchecking this option will
not change the new swatch.
4. (Optional) Click Add to Swatches to add the selected color to the Swatches panel.
5. Click OK.
Paint on HDR images
You can edit and add effects to HDR/32-bpc images using any of the following Photoshop tools: Brush, Pencil, Pen, Shape, Clone Stamp, Pattern
Stamp, Eraser, Gradient, Blur, Sharpen, Smudge, and History Brush. You can also use the Text tool to add 32-bpc text layers to an HDR image.
When editing or painting on HDR images, you can preview your work at different exposure settings using either the 32-Bit Exposure slider in the
document info area or the 32-Bit Preview Options dialog box (View > 32-Bit Preview Options). The HDR Color Picker also lets you preview your
selected foreground color at different intensity settings, to match different exposure settings in an HDR image.
1. Open an HDR image.
2. (Optional) Set the exposure for the image. See Adjust displayed dynamic range for 32-bit HDR images .
3. For the Brush or Pencil tools, click the foreground color to open the HDR Color Picker and select a color. For the Text tool, click the color
chip in the Text tool options bar to set the text color.
The Preview area of the HDR Color Picker helps you select and adjust a foreground color in relation to different exposure settings in the
HDR image. See
About the HDR Color Picker .
By default, the Toning Curve and Histogram limit and equalize your changes from point to point. To remove the limit and apply more
extreme adjustments, select the Corner option after inserting a point on the curve. When you insert and move a second point, the curve
becomes angular.
Adobe also recommends
Adjust HDR exposure and toning
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