To make changes to the buttons on your website, select the Manage Your Site tile.

Select the button, and then select the
Styling icon.
Before adjusting the button’s position,
select the alignment closest to where you’d like the button. In this example,
we want the button to be centered underneath the text, but selecting center alignment
does not make it centered for this specific design.

So we can now adjust the position of
the button using the position bar. The button is now moved to the desired
position.