Kleopatra allows you to customize the appearance of (validated) keys in the list view. This includes the foreground (text) and background colors, as well as the font.
Each Key Category on the left is assigned a set of colors and a font in which keys belonging to that category are displayed. The category list also acts as a preview of the settings. Categories can be freely defined by the administrator or the power user, see the section called “ Creating and Editing Key Categories ” in Chapter 6, Administrator's Guide.
To change the text (foreground) color of a category, select it in the list, and press the Set Text Color... button. The standard KDE color selection dialog will appear where you can select or create a new color.
Changing the background color is done in the same way, just press Set Background Color... instead.
To change the font, you basically have two options:
Modify the standard font, used for all list views in KDE
Use a custom font.
The first option has the advantage that the font will follow whichever style you choose KDE-wide, whereas the latter gives you full control over the font to use. The choice is yours.
To use the modified standard font, select the category in the list, and check or uncheck the font modifiers Italic, Bold, and/or Strikeout. You can immediately see the effect on the font in the category list.
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