66 Recording and Playing
3.Press the EXIT button.
4.They are sorted by the specified option.
To lock a recording file
To lock a recording so that other people cannot play it, per- form the following steps:
1.Put the highlight bar on a desired recording.
2.Press the 
button to display the additional options.
3.Set the Lock option to Locked.
4.Press the EXIT button.
5.The lock symbol (
) is displayed on it.
If you select a locked recording to play it back, you will be asked your personal identification number.
To rename a recording
To change the name of a recording, perform the following steps:
1.Put the highlight bar on a desired recording.
2.Press the 
button to display the additional options.
3.Select the Rename option, and the
4.Change the name and save it. See § 6.2 for how to use the
To make a new folder
To make a new folder, press the 
button; then a new folder named GROUP # is created. You can change its name in the same manner as renaming a recording. See above.