Drag and drop
Drag sections of configuration with the mouse to reorder them.
Ctrl+drag sections of configuration to copy them - between sections or between routers.
There are a number of other ways to copy and move configuration sections. Copy and paste are available from the outline view. Shortcut keys are also provided while editing - pressing Ctrl+Alt+Down will instantly copy a section, pressing Alt+Up and Alt+Down will reorder sections.
Try copy and paste as a quick way to define groups (as used by the apply-groups command). Copying sections to the parent groups section will automatically create a new group with those sections. The same thing happens when pasting under logical-systems.