How to open the floating window of Huawei Glory 20i mobile phone?

1, open the phone and click Settings, as shown in the figure below:

2. Click to open the privacy option in the settings interface, as shown in the figure below:

3. Click Permission Management, as shown in the figure below:

4. Click to open the permissions at the top of the interface, as shown in the figure below:

5. Click to open the floating window at the bottom of the interface, as shown in the figure below:

6. Finally, select the application that needs to open the floating window in this interface, as shown in the following figure: