You might find your self in this situation: You have a block where you use a lot of axes, something like this:

Now after you have edited and customized all your settings you realize that you actually wanted the "Delta" axis first, so that it show as the first column in a table. You might be tempted to hit the red X button and start again, but there is an easier way:
You can simply change the axis using the "column" dropdown. Like this: