# Synchronizing Playback

Navigation: Working with Nx Witness > Playback in Nx Witness > Viewing Archive and Live Display > # Synchronizing Playback |

Nx Witness provides a powerful engine that enables users to navigate through multiple cameras: if several cameras are displayed at the same time, they can be synchronized.

If a user performs a search, fast forward, rewind or search by frame each camera will be synchronized. If no recording took place over a certain period of time, NO DATA will display on the camera view.

Recorded fragments are displayed on the Timeline in two rows:

•The upper row displays fragments for Camera selected on the viewing grid

•The lower row – for all Cameras displayed on the viewing grid

It is possible to disable s ynchronization (press SYNC button). If no Item is selected, the selection will move to the previously selected item, which will become the only item affected by playback controls (seek, speed etc).

Thus, if Synchronization is disabled, it is possible to seek each camera in a different position. In this case Timeline displays positions for all camera played back (see blue markers on the picture):

If a camera is selected on the viewing grid and enables s ynchronization again, all other cameras will synchronize time and speed with the selected c amera.