If you’d like to send a downlink to multiple devices, you can navigate to to ‘Devices’ → ‘Multi Downlink’.
On this page you can select your device type (driver).
After selecting your device, you can select your Downlink type on the left and set the desired configuration. On the right you can select all the devices you wish to send a downlink to. When done, press the ‘Queue’ button on the bottom right of the screen. The next time your device sends an uplink, it will receive a downlink with the new configuration.