"Scrollable" refers to something that can be scrolled or moved up and down or left and right, usually on a screen or webpage. It allows you to view additional content that may not fit on your screen all at once.
What you get is a vertically scrollable list of the playlists and albums you've synced over. (pcworld.com)
In February 2017 Patently Mobile posted a report titled «New Samsung Patents give us a Peek at their Work on Next - Gen Smartphones and Mobile TVs with Scrollable Displays.» (patentlymobile.com)
Developers will also be able to make scrollable widgets in Android 3.1 resizeable. (mobiputing.com)