It is possible to create and save a set of customized default styles which will be used by default each time a new project is started. Here is a step by step guide on how to achieve that:

  1. Create a customized set of styles using the styles editor
  2. At the bottom of the styles editor, click "export..."
  3. Styles must be exported to your home HelpNDoc folder, which is "My Documents\HelpNDoc\Styles\default.hns" by default and can be customized in the Options window.

For now on, each time a new project is created, the set of styles defined in this file will be loaded and available for that project.

See the How to customize the default styles for new projects step-by-step guide.