Adding a new sibling row
To create a new row that is associated within the same group immediately after the currently selected/edited note, hit the Return key. This will add the new row directly below the current row and any of its descendant rows and place it into editing mode. To add a new row above the current row, hit the Shift-Return key combination. This will add the new row and immediately place it into editing mode.
Deleting the currently selected row
If a row is not currently being edited and it is selected, hit the Delete or Backspace key to delete the row (and any of its descendant rows).
Indenting the current row
Hitting the Tab key if a row is selected (or is being edited) will indent the current row, making it a child of the row directly above it. If the row is already a child of a row, it cannot be indented.
Unindenting the current row
Hitting the Shift-Key key combination if a row is selected (or is being edited) will unindent the current row, making it a sibling of the row originally containing the current row.