DVD Space question

I have the latest version of Nero( I also have a Liteon 451S@832S as far as I know the firmware upgrade was a success. I don’t yet have any DL DVDs to try to burn, but I wanted to know wether Nero would show the full space in the dvd space bar If I just make a new dvd project. At the moment it doesn’t and I wanted to know if this is the expected behavior, or wether it should show 8GB regardless of wether a DL disk is inserted? Nero does recognize my drive and the info tool says it supports DL burning.