About audio changes

Hi @隆弥35277044k5b3 ,

Welcome to the Premiere Pro forums! We are glad to see you here. We need a few more details to try to help with the issue. Please see, How do I write a bug report? If you could provide a screenshot or video like Ann suggested that would also be very useful. 

Thanks for submitting your bug report. I hope we can help you soon. Sorry for the frustration!

Thanks,

Ian

Not sure what the issue is: screenshot would help.

You can only change the clip channel of a clip in the project window.

Then you will have to re apply the clip to the timeline.

Is the OK button off screen (at the bottom)?

Minimum resolution for Premiere is 1920x1080.