Your Storemapper comes with the three built-in layouts: Horizontal, Vertical and Search On Top. You can access them from your account dashboard.
Horizontal represents a two-panes layout, having stores list on the left and map on the right.
You can easily switch the order by using the following CSS code
Vertical layout has the map on top of the store list.
Search On Top layout mostly looks like the horizontal one, i.e has store list and map placed side-by-side, but the main difference here is that search form is fixed on top.
Note: ‘Search On Top’ layout is available only under Storemapper Default 2.0 theme, so you’ll need to ensure it’s chosen in your account settings.