In the 4010, the cursor and graphic crosshairs were interactive and used "dark mode" to move about the screen without writing to memory. This was accomplished by writing with less energy in the beam, just enough to be seen but not enough to store it. The 4014 added escape codes to allow the user to select this mode deliberately by sending any of the sequences from through . This was especially useful in graph mode, as it allowed the system to draw movable objects, although at the cost of having to continually refresh them over the serial link at about 30 times a second in order to avoid flicker. This could be used, for instance, by drawing the outline of a gauge and its scale markers normally to cause them to store, and then drawing the needle interactively using dark mode. It could also be used to move the graphics cursor to a new location without having to exit and re-enter graphics mode, previously the only way to accomplish this. Sending through set the terminal to "defocussed mode" which drew at reduced intensity by making the beam slightly wider and spreading the energy out over a wider area. Finally, through returned the terminal to the normal storage mode.