By default the editor cursor blinks on and off at the usual rate for your computer.
To change the blink rate, select Specify in the Cursor Blink Rate area. Either scroll to choose the rate in Milliseconds, or enter an integer between 100 and 2000.
To stop the editor cursor from blinking, select None in the Cursor Blink Rate area.
LispWorks IDE User Guide (Windows version) - 25 Nov 2011