You can specify a custom style on the Advanced tab of the
Properties panel. You must enter the custom style name.
Use lowercase letters and hyphens to refer to CSS files, classes, and identifiers.
Hyphens improve readability, the semantic value of the item, and match the syntax of CSS
attributes, for example, margin-left. Avoid articles and conjunctions.
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Click Add item.
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In the Style Name field, describe the purpose, rather than the
style.
Specify the primary category of purpose first, as in this example:
.marker-form-error
The prefix custom_ is prepended to the class name that you
specify.
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Define the style in the CSS field. Click the
Gear icon to open the Style Editor. You must enter the name
custom_ classname on the Advanced tab of the
Cell Properties panel to use this custom style.
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To delete a custom style, select the style and click the Delete
icon.
Result:
When customizing layout styles, it is a best practice to define a custom style in a skin
rather than specify inline styles in the Properties panel for the
layout. When you save a section that contains an inline style, a guardrail warning appears
and you have the option to use the Remove Inline Style button.