Cameras can be box-selected.
There are two ways to enable or disable a camera in the volume:
Click the (Eye) Icon next to each camera listed in the default scene inspector
Select the camera and click the Show/Hide button in the camera inspector
The frustum of a camera is displayed as the advised maximum distance a marker is visible in. By default, this distance is set by the [heat map marker], this is modified when a [marker is selected].
The visibility of all camera frustum can be enabled/disabled by clicking the [Camera Frustrums] button in the [Options Toolbar].
The frustum color matches the lens type. Cycling through the [Camera Outlines] to switch the frustum color between standard and lens type.
You can measure the distance between any camera and another camera, or marker, by using the Measure Tool.
Press the Measure Tool button.
Hover a camera or marker you want to measure the distance to.
Select the marker if you want to persist the measurement tool while the marker is selected. Select Cancel or another object to cancel the measurement.