Click Tools > Options. The Options dialog appears.
Select the Scan Settings tab.
In the "Display Interval (10-255 sec):" field, specify the number of seconds you want the target that is in focus to display in the center of the Port Scan window.
In the "Interval Between Ports (10 - 255 sec):" field, specify the interval at which the device should pause between ports.
In the Display section, change the default display options for the thumbnail size and split orientation of the Port Scan window.
