Getting things working the way you want / need will take some reading, and some trial and error. Go to the EFILive home page (www.efilive.com) and select the downloads tab, then select the documentation / tutorials option. Download the Scan Tool manual (if you don't already have it). Also, there is a very short interactive tutorial called "How to create a PID list" - that may be of help.
Once you create a rudimentary PID list, connect to your controller, and validate the PIDs. To record data press "F3" - to stop recording press "F4" (you will then be prompted to save the log). To monitor data (but not record) press "Ctrl" and "M" at the same time - to record from this monitoring state, press "Ctrl" and the "space bar" - or F4 to end the monitoring process.
It will take a little time to get comfortable with the Scan Tool. I still learn something every time I do something out of the ordinary.
Regards,
Taz