You can select the active pattern using Seq1/Seq2/Drum+Step buttons. However, you can only see which patterns have data if you are saving.This is a problem, because if I press Seq/Drum+Save to see which patterns are active, it's easy to accidentally press a pattern, and over-write it, when I meant to select it.
If the patterns with data lit up when pressing the Sequence/Drums buttons, it would be easier to select patterns that you know have data, and reduce the risk of accidentally over-writing good patterns..