Vivitar 840XHD 用户手册
![Vivitar](https://files.manualsbrain.com/attachments/4034af14170e7d3c8a31eee3d8043b1095e4a66a/common/fit/150/50/f434ba12af532a0590ef2885f6c5bf27e24e71a96277e9850b74380aeffe/brand_logo.png)
71
1.
Use the Down button to select the Lock submenu.
2.
Press the OK/Menu button to open the Lock menu screen
3.
Use the Right/Left button to select the picture.
4.
Use the Up button to lock/unlock all the pictures.
5.
Use the Down button to lock/unlock the presently selected picture.
6.
Press the Playback button to Exit.