You want to adjust their position? Just drag them wherever you want. Instead of manually adding coordinates for each one of your markers, just click-and-drop them directly on the map. Benefiting from Gutenberg's potential, the plugin tries a different take on how to add your locations on the map and rethinks a few things, UX-wise. It needs no API keys and works out of the box (or, out of the Block, if you prefer). A map block for WordPress' Gutenberg Editor which uses OpenStreetMap and Leaflet.js.