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# 8.2.1 Spray testing

Users can test the spraying speed before the actual flight using this functionality. Tap on "**Spray testing**" from the main screen of the Spraying System Settings. The user will see the following screen. 

<figure><img src="/files/MbZvW11Ww1YXRUXgAwhy" alt=""><figcaption><p>Spray testing</p></figcaption></figure>

Adjust the spraying percentage using the slide bar, then click the "**OK**" button to conduct a test run with the selected value. **Ensure that the tank is filled with liquid, and the pumps are turned on during this process.**