To move subalignment there are different ways:

  1. Select a subalignment and drag and drop it. The subalignment will be moved.
  2. With a help of the Spase the subalignment will be moved to the right by size of the selection. With a help of the Backspase the subalignment will be returned to the first state.  
  3. With a help of the Ctrl+Spase the subalignment will be moved to the right by one column. With a help of the Ctrl + Backspase the subalignment will be returned to the first state.