Select the last column
Column 1
Column 2
Column 3
Column 4
Cell 1.1
Cell 1.2
Cell 1.3
Cell 1.4
Cell 2.1
Cell 2.2
Cell 2.3
Cell 2.4
Cell 3.1
Cell 3.2
Cell 3.3
Cell 3.4
Cell 4.1
Cell 4.2
Cell 4.3
Cell 4.4
Cell 5.1
Cell 5.2
Cell 5.3
Cell 5.4