You can use the Column Filter button (see: https://1800notify.zendesk.com/hc/en-us/articles/360053722791) or you can simply drag and drop the column header.
To Move a Column
Grab the Column header row and move it left or right. Click and drag it with the mouse.
Keep dragging it - you will see the column move on the screen (holding your mouse button down while moving the mouse left or right).
Then, drop it (let go of the mouse key) when you get the column where you want it moved.
Getting back to the default layout
If you move too many columns around and just want to get back to the default layout, then click the Column Filter button and "REVERT BACK TO DEFAULT"