Hi and welcome to the forum, WilliamKF!
Switch to 'Write' mode and you'll see the Device menu.
Normally ImgBurn should apply the book type automatic for LGs - if you have the 'Auto Change Book Type' option enabled in the Write tab in the settings.
Some older writers have problems if the 'Perform OPC...' is enabled - that's why it got disabled by default in the later versions. I have it enabled.