NeroVision-Selecting titles ?

I can't figure out how to select which titles you want to import from the list using NeroVision. SELECT ALL is a no-brainer. Also just selecting one is pretty simple. I can't figure out how to select several but not all. Clicking on a title highlights it in blue, but when I click on a second title I want it "unselects" the previous one. How's it done?

 

After selecting the first one hold down ctrl key on keyboard and select other ones to add.

 

Thanks a lot. Appreciate your help. Pretty simple once you know it.