Available keyboard commands:
←: Move handle left 0.1 staff space (one staff space is the distance between two staff lines, as
set in Page Settings)
→: Move handle right 0.1 staff space
↑: Move handle up 0.1 staff space
↓: Move handle down 0.1 staff space
Ctrl+← (Mac: ⌘+←): Move handle left one staff space
Ctrl+→ (Mac: ⌘+→): Move handle right one staff space
Ctrl+↑ (Mac: ⌘+↑): Move handle up one staff space
Ctrl+↓ (Mac: ⌘+↓): Moves handle down one staff space
Alt+←: Move handle left 0.01 staff space
Alt+→: Move handle right 0.01 staff space
Alt+↑: Move handle up 0.01 staff space
Alt+↓: Move handle down 0.01 staff space
Shift+←: Move handle's anchor (the note or measure to which it is attached) left
Shift+→: Move handle's anchor right
Tab: Go to next handle