## Histogram Bar

The histogram in the Histogram bar illustrates the distribution of event frequency and thus provides a quick overview of the events of one or more cameras. You can open the histogram in the Playback view and in Grid Playback by clicking on the dark gray frame border or clicking on the View > Smart Data Bar in the menu. To begin with, the histogram always shows the entire range of the events logged by the camera.

Fig. 117: Histogram bar

- Displayed time range: The timestamps at the top and the bottom of the histogram show the first and the last of the available events logged by the camera, respectively. You can change this range manually. A small cross at the left of the time range indicates that it has been changed manually. Click on the cross to reset the timestamps to their original values.
- Filter feature: You can filter the display by camera and group or by event type. There two sliders for this purpose: the camera filter and the event filter . To set the filter, move the sliders until you see the desired results.
- - Camera filter:
    All cameras , cameras from the current group ,
    current camera .
  - Event filter:
    MxActivitySensor events , video motion events , PIR events , microphone events , signal input events , temperature events , illumination events , bell events , voice mailbox messages , Door Station events , RFID rejected , PIN rejected , all event types .
  Note
  If background alarm calls have been deactivated in the Camera Configuration dialog box (see Entering and Editing Network Data), the application will only open an connection for the cameras if necessary, such as when live stream of the camera or recordings are played back via the camera. This means that if you set the camera filter to All cameras when background alarm calls are deactivated, only the data of the currently connected cameras is then displayed in the histogram.
- Structure of the histogram: The histogram is split into the overview area on the left and the zoomed area of the selected range in the overview on the right. The yellow scroll bar in the overview area shows the range that is displayed in the zoomed area. Click on to set the displayed time range in the zoomed area (for example, six hours or one day). If you have set the zoomed area to "Custom", you can modify the displayed time range by dragging the frame of the scroll bar.
  If you want to see only events in the zoomed area that have triggered recordings, click on .
  The pink bar indicates the time range in which recordings for the logged events exist.
  Note
  The range of logged events may reach farther back than the recordings.

- Distribution of frequency: The length of the bars indicates the frequency of logged events per time unit. Click on , if you want to examine the distribution of frequency for a specific point in time in more detail. The display switches to a higher resolution.
  If you want to get more detailed information on a specific point in time with a high event frequency, click on the interesting spot in the zoomed area or the overview area. The red marker shows the current position. If a recording is available at this position, you can play back the recording in Playback view.