Hi Becky--as of v2008, neither DirectRT nor MediaLab have a pause/resume type of feature. This is a frequently requested option though and is on our to-do list for the next version. Until then, all I would suggest is exactly what you are doing--pressing ESC to end the session and then resuming by running the remaining trials. Note that if your random content is generated as a function of the RAND functions (see www.empirisoft.com/directrt/help/directrt_using_random_values.htm) then you could restart the session by running the remaining trials in the revised version that will be located in your experiment folder after the session--i.e., with all the random values retained for the next time you run it. -Blair