Do you mean the image gallery? Also, do you mean you want the pager at the bottom of the page instead of the top?
Whatever it is you want to re-arrange, these days you can re-order things in CSS using Flexbox, by setting their wrapper to have
display: flex; and then setting them to have
order: 1, or
order: 2, etc. Note that this can impact the way that they arrange in more ways than just their order, here's a good guide on using Flexbox: https://css-tricks.com/snippets/css/a-guide-to-flexbox/