Keystroke: l (as in Lima) from Line Codes menu
The Line Codes pull-out list under the Layout Menu and contains format codes related to lines.
New Line (or Ctrl + l) l as in Lima
Skip Line (or Ctrl + k)
Suppress Skipped Line (or Alt + k)
Centering (or Shift + F6)
Flush Right w/Leader (or Alt + F7)
Tab to Runover Point (No keyboard shortcut)
Single Spacing (No keyboard shortcut)
Double Spacing (or Shift + F2)
New Paragraph (or Ctrl + m)