Nudge mode (SHIFT button). Holding the button down activates "handles" for most objects allowing you to move them around.
Every object will display control "handles". Click and drag the handles of an object to reposition it. You can select any group of notes and they will all move horizontally together when you Shift & drag a note.
The NUDGE mode tool is found in the Text & Tools category inside Symbols Selection window.
Watch NUDGE mode in action …