On the column letter A Left mouse click once, Now right mouse click once and
select cut from the list, On the column letter E Left mouse click once, Now
right mouse click once and select insert cut cells.
Column A will now be column D.
Davids reply would have moved all columns across 3, therefore column B would
now be E and so on. This would not work for you if you have data in columns
B, C & D which need to be left as they are.