Vertically split Direct Select Banks

I'd like the ability to split DS Banks vertically. I can only split Banks horizontally and the result is kind of random based upon the number of Rows. 15 Columns of 3 Rows is wider than 15 Columns of 1 Row.

If I use the 3 Vertical spaces layout format, Banks are still spilt horizontally. I can use 100% Custom DSs, however then I can't move banks by adding rows, I have to move ever single DS.

Also, option for Arrows, Flexi, & Select to be placed at the bottom or top.