I have a Chamberlain port, a 2 channel remote device and an IPhone with the MyQ Liftmaster Application. I programmed the second button on the remote device to open the port partially. That works fine. But I read somewhere this function (open partially) could be initiated via MyQ and the app. I did not managed to have this feature started. Opening and closing with my phone works fine. I get an alert if the garage door is in open position after a certain time. I can close and open the door remotely wi th one channel. I can open partially and close completely the door wit the second channel. Could anybody provide me the way how to open the door partially using the app or web? Thanks.