The attached zip files can be imported in your Dashboard to give you an example QoS viewer by device or by qos name.
1 - qos_context_selector_device.zip
This can be used if you want to know quickly what qos is collected (+ the current samplevalue) for a specific device
From the drop down you select one of your devices and you will receive the last QoS values collected for this device
2 - qos_context_selector_qos.zip
This can be used if you want to have a view what devices create a specific qos
From the drop down you select one of your qos names and you will receive a list of devices/targets for this qos with the last collected samplevalue.