Manual formatting in Help+Manual works exactly as it does in a modern word processor. You apply formatting to text manually with the tools in the Write tab of the Ribbon, where you can select formatting options for Font, Paragraph and Borders and Background.
Generally, however, you should use styles for formatting your text. Styles are more efficient, create uniform-looking documents and enable you to reformat your entire project quickly just by changing your style definitions. When you are working on a project in a team styles are essential for uniformly-formatted documents
You can assign keyboard shortcuts to most manual formatting tools. Select View > Program Options > Keyboard Shortcuts to access the settings.
The Format Menu (Reference)