How do I change the channel?

The best potential feature of this app is to alert when a certain channel would give a stronger connection at a given time. I get the alert, but have never been able to figure out how to change to the suggested channel. It would be great if you could click on the yellow “!” roadsign icon and it would instruct the user how to changee the channel. That’s the whole point of it, right?

Meandermusic about WiFi Signal: Strength Analyzer, v4.0.2