Two Numbering Systems

Two different numbering systems can be used in the Curves dialog box. You can switch between the 0–100% system and the 0–255 numbering system (which we used in Levels) by switching between ink and light (remember the little arrows that appear in the middle of the bottom gradient). Go ahead and give it a try (Figure 6.58).

Figure 6.58. Click the arrow symbol to switch numbering systems.

There are two main causes for undesirable results: making the curve flatten out (become horizontal) or making the curve go downhill (when ...

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