I've always left it on "DVD-5" mode. Is what interests me is that if you select "Custom" you can enter your own capacity.
I'm brand new to this and have only done approx. 50 Taiyo Yuden DVD+R's, writing at 16x on the majority---flawless results.
A Statement: isn't it true that DVD+R's contain approximately 4,700,372,992 bytes (i.e.,4.37756 gigabytes, 4482.6250 megabytes )
My curiousness: If I change the format to "Custom" and then input "4482" MB, compared to the normal DVD-5 setting, the quality bar percentage value decreases. In other words, it appears that format DVD-5 is larger than the "Custom--4482MB".
Example: in the movie "28 Days Later" the percentage will go from 80% down to 75% AFTER selecting the custom format (4482mb).