If the brush thickness changes in real time when sliding up or down on the Xiaomi Focus Pen Pro in the Mi Canvas App, please refer to the following aspects:
1. To adjust the brush thickness by sliding the Xiaomi Focus Pen Pro up or down, you need to lift the Xiaomi Focus Pen Pro, slide it, and then lift your finger again. You should feel a vibration from the Xiaomi Focus Pen Pro when the adjustment takes effect. This design is to prevent accidental touches during creation and to allow for more precise adjustments.
2. For optimal use, always ensure the Mi Canvas App is updated to the latest version and the Xiaomi Focus Pen Pro firmware is up to date.
3. If brush adjustments still do not work as expected, try restarting the App or reconnecting the Xiaomi Focus Pen Pro, and contact the local after-sales service if issues persist.