To activate AVD/Device Manager in IntelliJ for Android development, follow these steps:
Open the IntelliJ IDEA IDE.
Open the Android Studio project you want to work on.
In the top toolbar, click on the "AVD Manager" icon or go to "Tools" > "AVD Manager".
If you don't have any virtual devices created, click on the "Create Virtual Device" button.
Select the device you want to emulate and follow the on-screen prompts to set it up.
Once you have a virtual device created, you can start it up by clicking on the play button next to it in the AVD Manager.
Alternatively, you can use a physical device by connecting it to your computer via USB and enabling USB debugging on the device. Once connected, it should appear in the "Device Manager" tab in the bottom toolbar.
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