Hello there,
The searchbar is a leaflet plugin named Leaflet Search https://github.com/stefanocudini/leaflet-search
It is set as is in Travelers map.
You could add some CSS if you want to make it bigger, but you can’t set it outside the map.
Example of CSS to add to your site (ou can tweak the values if you want)
.travelersmap-container .leaflet-control-search .search-input {
height:33px; //add height to the searchbar
padding:0 50px 0 11px; // change inside margins of input field (top right bottom left values)
}
.travelersmap-container .leaflet-control-search .search-button {
margin-top: 6px; // center the search icon vertically
}