Scrolling pictures in Media folders instead of 25 pics for page

Maybe there is a setting I can't find, but how can I set my Media folders to scroll thru lots of pictures. rather than having to click "Next Page" every 25 pictures. I'm a long time Platinum user, and am just getting into posting more media, I thought I remember that being mentioned on the list of advantages?

Page by page is all we have (she spits, having 10,000 images to deal with). I believe an attempt was made at the continuous scroll with the move to Lush2, but it proved problematic and quickly disappeared.