Add an example for birdseye override at camera level (#3922)

docs/docs/configuration/birdseye.md

@@ -12,3 +12,24 @@ Birdseye offers different modes to customize which cameras show under which circ
 ### Custom Birdseye Icon
 
 A custom icon can be added to the birdseye background by provided a file `custom.png` inside of the Frigate `media` folder. The file must be a png with the icon as transparent, any non-transparent pixels will be white when displayed in the birdseye view. 
+
+### Birdseye view override at camera level
+
+If you want to include a camera in Birdseye view only for specific circumstances, or just don't include it at all, the Birdseye setting can be set at the camera level.
+
+```yaml
+# Include all cameras by default in Birdseye view
+birdseye:
+  enabled: True
+  mode: continuous
+
+cameras:
+  front:
+    # Only include the "front" camera in Birdseye view when objects are detected
+    birdseye:
+      mode: objects
+  back:
+    # Exclude the "back" camera from Birdseye view
+    birdseye:
+      enabled: False
+```