Using the GKS version of the commands you must enter the name of the graphic device in use. Generally the device is the terminal where you are logging on and you must enter just the type of this device (for example VT125, TEK4010, XWIN). These codes are shown answering ' ? ' when the task asks for the graphic device type.
Sometime you can want to have the drawing on a device that is not the same terminal on which you are running the task. In this case the graphic device must be defined in the [DIRA2]GKSDEV.DAT with a proper name. When the name is present it is shown in the list of the device names that you can get with a ' * ' . Otherwise the Data Base Administrator can update the GKSDEV.DAT file and insert the logical name and the physical link to the device. Using 'remote' graphic device you can follow the name of the device with a ' * ' , so you have the full screen for the commands on your working terminal.
Also the hard copy devices are seen as remote devices. Usually you send a plot to an hard copy device during an interactive session, but you can use an hard copy device as a direct graphic device. This feature can be very useful when working log files available. The plot is executed when you 'EXIt' from the task.
Using the GKS version of the tasks the CTRL+U key stops the cursor action and have the same effect of the middle button in the mouse, then the ENTER key on the keyboard has the same effect of the left button. Note that on a VT125/VT240 terminal the keys F3 and F4 acts on the displacement factor of the cursor.