You can define the L*a*b* values or the CMYK values of a spot color by typing the numerical values, by selecting a visual match from a pattern of color swatches, or by measuring the color of a physical object using a measurement device.

1. From within Spot Pro, locate the spot color you wish to edit and click the Edit icon () .

   You can rename a custom spot color or a custom spot color group.

2. Do one (or a combination) of the following:

   • To edit the L*a*b* values directly, click in the L*, a*, or b* field and type a new value. Use the Tab key to move from one field to the next. A preview of the converted color is displayed next to Original.

     Note: You can click the arrow next to L*a*b* to switch the editing mode to CIE LCH to edit the LCH values directly. In the LCH mode, you may modify lightness, hue or chroma for the selected spot color.

   • Click Measure to measure the L*a*b* values and follow the on-screen instructions.

     Select a measurement instrument from the available list.

   • To edit the CMYK percentage values directly, click in the C, M, Y, or K field and type a new value. Use the Tab key to move from one field to the next. A preview of the converted color is displayed next to Original.

     The separation values are computed based on the selected output profile for the given media or substrate. This may be particularly useful to remove contaminants or visual artifacts, such as spotting, or a cloudy appearance caused by black or cyan dots. For CMYK+ profiles, the respective ink separation is available for editing. For example, CMYK and Orange and Violet separation values may be edited when a CMYKOV output profile is selected.

   • To edit the spot color visually, the currently selected color is reflected in the center patch of the center hexagon in the lower area of the Spot Pro color editor pane.

     The active controls for changing the color are the poly-hexagonal shapes. The target color is highlighted. The hexagons to the left and right represent the next variation of saturation or brightness. The color variations arrows (red, green, blue, cyan, magenta, yellow) show the direction of the color hue shift from the center patch. Clicking on an arrow moves the targeted color in the direction of the arrow.

     To control the magnitude of variation in the neighboring patches, move the slider closer to Fine (for smaller variation) or Coarse (for larger variation). The Fine or Course slider provides the increment of edit that will occur per click. The default setting is in the middle.

     Note: When you select certain colors, an exclamation point icon may appear in the upper-right corner of the Spot Pro color editor pane. This icon indicates that one or more colorants have reached their maximum values.
3. To print a test page, click the arrow next to Variations and select Print.

   You may choose the patch layout for the variations, and select the media or substrate source.

   Matching spot colors accurately on a monitor is very difficult. Always print a test page to get the proper color match.

4. Do one of the following:
   • Click Done to finish editing and to exit the Spot Pro color editor pane.
   • Click Cancel to abort editing, exit the Spot Pro color editor pane, and return to the Spot Pro color preview pane.
   • Click Save to save your edits and switch to a different spot color, without leaving the Spot Pro color editor pane.
   • Click the Reset icon () to revert to the original value of the spot color when created, which is shown in the Original.