Compare the output of commands:
show configuration show configuration commands
Basically, they're the same, in different format. Now you have a clue how to transform partial config rules in {} format into commands to enter on CLI. (is there a util to transform back and forth??)
Use commit-confirm to apply changes. It also schedules a reboot with old config, for if you locked yourself out.
To cancel this reboot, use command "confirm" , and save to make changes permanent