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Adjust CMYK curves of a job

This topic contains the following instructions.

Open the CMYK curves editor with pixel precise preview

  1. Touch [Jobs].

  2. Go to the list of waiting jobs.

  3. Select the job you want to change.

  4. Press [Edit].

    Edit job

  5. Touch [Adjust image].

    The CMYK curve editor with pixel precise preview opens the [Basic mode] window.

    CMYK curves editor in basic mode

Adjust the CMYK curves in basic mode

  1. Select the page you want to edit. When you select multiple pages, the last page of the selection is shown.

    You cannot edit the CMYK curves when the selected pages have different CMYK curves.

    To undo the selection, touch and hold a single page.

  2. Apply a correction with a preset.

    Correction with a preset

    • Press [Load].

      The list of presets contains standard and custom presets. You can also use a standard preset as a starting point to create new presets.

    • Select one of the standard presets.

    • Press [Done].

      Note that the CMYK curve editor switches to [Advanced mode].

    • Examine the changed CMYK curves.

    • Touch [OK] to apply the adjustment or touch [Reset] to restore the original CMYK curves.

  3. Apply a correction with one of the CMYK sliders.

    Correction with the CMYK sliders

    • Touch and move the [Yellow] slider. You can also use the + and - buttons.

    • The combined control, below the [Black] slider, changes all sliders at the same time. Touch the + and - buttons to adjust the combined control.

    • Touch [OK] to apply the adjustment or touch [Reset] to restore the original CMYK curves.

  4. Apply a correction with the contrast slider.

    Correction with the contrast slider

    • Touch and move the [Contrast] slider.

    • Touch [OK] to apply the adjustment or touch [Reset] to restore the original CMYK curves.

Adjust the CMYK curves in advanced mode

  1. Select [Advanced mode].

    CMYK editor in advanced mode

  2. Plot anchor points.

    • Select one of the tone curves. In this example, [M] is selected.

    • Touch a location on the curve.

    • When you touch an anchor point it shows: .

    • Touch the trash icon to remove an anchor point.

    • Touch the color picker tool .

    • Touch [Add points] to plot another anchor point.

  3. Move the anchor points.

    The [Input] field represents the input density (%) of the selected anchor point on the curve. The [Output] field represents the output density (%) of the selected anchor point on the curve.

    • Use the + and - buttons of the [Input] and [Output] fields to change the position of an anchor point .

    • Drag an anchor point to another position. A raster can help to locate the anchor point.

  4. Contrast

    • Plot also anchor points on the [C] and [Y] curves.

    • Press .

    • Touch the contrast slider to adjust the contrast.

    • Touch [OK] to apply the adjustment or touch [Reset] to restore the original CMYK curves.

  5. Clip the highlight and shadow tones.

    • Select [Y].

    • Touch a clipping control and drag it to a new position.

    • Touch the other clipping control and drag it to a new position.

    • Select [C] and move the clipping controls.

    • Touch to undo or redo one adjustment step.

  6. Save the adjustments for later reuse.

    1. Press [Save].

    2. Enter a name for the preset.

    3. Press [Save].

More information

Parent topic:
Use CMYK curves
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