If you want to set the port number and the source for the output, you will have to go to the System parameters form. To do this, type Alt-S or access it via the system menu for the window. The following screen is the system parameters form for the digital output. The next screen shows the parameters form for the digital input. Typing Alt-S takes you to the system parameters form shown below.
All devices have a text mode diagnostics screen as well.
This screen is accessed by clicking on the devices in either yellow or red modes. Following is an example diganostics screen for a servo motor.