Your store locator comes with the three built-in layouts: Horizontal, Vertical and Search On Top.
You can access them from your account dashboard.
- Login to your account from our sign in page or by clicking on Storemapper from your Shopify Apps (if you installed Storemapper from Shopify)
- Go to Settings -> Basic Settings and choose preferred layout from ‘Choose layout’ option.
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
https://gist.github.com/lerniri/2f1da4afce179d54137a106194358f4d
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.
