A Land Far Away

I set up a vertical hotbar on the interface so I could put more accessible slots on the screen ...but I can't figure out how to populate it. Draggging stuff into doesn't seem to work.


What am I doing?

Try cycling your horizontal hotbar to the 9th or 10th row and try to populate it that way.

I can populate my vertical bars simply by dragging and notice that it also populates those horizontal bars simultaneously. Perhaps it will work in the opposite direction as well?