Optimizing wifi channel for GL-AL1300

I’m using GL.iNet router GL-AL1300. In some other router, there is a menu for optimizing radio channel for wifi. But I can’t find it here.

Any idea to automatically optimize wifi channel?

If it’s going to be anywhere it’ll be @ GL GUI → Wireless → $GHz WiFi → Channel per the screenshots:

Thank you for your help. Will try that.