How do you turn off the autotune feature?

I'm assuming you mean the facility that lets you autotune the radios.You can't really turn that off ... but you can choose not to use it.Here's how it works:1) ATC dumps you off to a different controller by giving you a new frequency.2) You acknowledge the frequency changeAt that point, your ATC menu will display a menu allowing you to pick from that menu to "autotune" your radio.But, you don't have to do that. If you manually tune the radio, that menu item will change to "Contact Controller."So ... you have two choices:1) Use the ATC menu item (which will autotune the radio)2) Manually tune the radio (and the ATC window will change automatically)Cheers!

Thanks fsxmissionguy.