Setting Up Switches and Scan Rate A switch is something that can be briefly tapped or held to send a signal to the device. A switch can be the device’s own screen, or an external switch that communicates with the device using a switch interface. To use one switch, go to Mode and select Automatic Scanning, Automatic Selecting or Inverse Scanning. To use two switches, select Step Scanning or Automatic Step Scanning as your Mode. One switch will be the Stepper, which will move the highlight to the next item. The other switch will be the Picker, which will select the currently highlighted item. You must tell Proloquo2Go what signal to listen for for each switch. To use part of the screen as a switch, tap Screen to define which part of the screen to use (whole screen, or top, bottom, left, or right half). To use an external switch, tap External to specify what character(s) the switch interface will send when the external switch is activated. All scanning modes except Step Scanning have a Scan Rate. This is the time each item is highlighted. To set this time, tap the - or + buttons on either side of the Scan Rate control. You can also tap in the middle of the control to bring up a keyboard and type in a specific scan rate. !74