Meaning of dvd multi-session

pu1. It's an option whether you can bake more after you finish baking the dvd, and then if you have enough, then you can bake more or you can' If you check the multi-session, please let me add more after this

2017-12-17

OK

pu2. I heard that if you check multi-session, you can only see the newly added content and you can't see the previously baked content. What do you think?

2017-12-17

OK

pu3. It's my first time hearing that I can't see the previous one if I check multi-session. LOL Of course, I can see all the previous ones and the ones I added

2017-12-17

OK