Offset a column.
xsOffset=11 xs=1
xsOffset=10 xs=2
xsOffset=9 xs=3
xsOffset=8 xs=4
xsOffset=7 xs=5
xsOffset=6 xs=6
xsOffset=5 xs=7
xsOffset=4 xs=8
xsOffset=3 xs=9
xsOffset=2 xs=10
xsOffset=1 xs=11