Document how custom maps and layer switcher works

I can't get the switcher to work.

I created a custom, following the method from the README file:

Apart from using any of the "off-the-shelf" maps, you can also assemble your
own map from the available layers at the Leaflet More Maps configuration page:
admin/config/system/leaflet-more-maps. A layer switcher will automatically appear
in the upper right-hand corner of the map.

To reproduce:

Create Custom map

1. Open "Leaflet More Maps" (/admin/config/system/leaflet-more-maps)
2. Create a "Custom map #1 layer selection", name: "CustMap"
3. Check esri-world_topo_map and esri-world_street_map
4. Save

Add to a content type display

1. Open "Manage display" (/admin/structure/types/manage/article/display)
2. Open a Geofield field
3. Set Format to "Leaflet map"
4. Click on the settings icon to the right
5. Open "Leaflet Map Tiles Layer" dropdown
6. See that there is no "CustMap" ...

Or am I doing it wrong, and need to set it somewhere else? In that case, perhaps the README instructions can be updated, and the correct steps included?

Also, if I go to the "Leaflet Demo page" (/admin/config/system/leaflet-more-maps/demo), I see a lot of these errors. Maybe a clue? Uncaught DOMException: Document.querySelectorAll: '#~CustMap' is not a valid selector

After getting a reply from @berramou I tried again, and for some reason the Layer switcher is shown. Great!

I updated the README with, after getting some great tips from @berramou.

berramou → closed merge request !7

Automatically closed - issue fixed for 2 weeks with no activity.