On the Customize Appearance tab in Guide Builder, you can set the color schemes, images, and text formatting for all parts of a form guide, including these:
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Note:
Guide Builder resets all form guide style information if you select a new form guide layout. You must save your style information in either a CSS file or a SWC file to reuse or share your style information.
When you change any style setting, you must save the styles in a SWC or cascading style sheet (CSS) file. If you save the styles in a SWC file, it includes the style settings and the layout settings that you selected on the Edit Guide tab. If you save the styles in a CSS file, you cannot include any images.
After you change the style settings, you should preview the form guide. If you have not saved the style changes, Guide Builder prompts you to save your changes. You can save the styles at any time by clicking Save Styles.
See also 

About customizing the appearance