This page lets you configure whether ReSharper should increase or decrease the number of blank lines around namespaces, members, regions and groups of import directives. You can adjust values in spin boxes, observing effects in the preview pane.
Options in the Preserve Existing Formatting section are applied when ReSharper reformats existing code whereas the Blank Lines section contains options that take effect when you type new code.
ReSharper's settings are saved in settings layers that enable you to have different settings for different solutions as well as to share your settings with your team. To learn more, study the Managing and Sharing Options section.