diff --git a/Customizations/JSON/LayoutConfigJson.ts b/Customizations/JSON/LayoutConfigJson.ts
index 6d079dc94..ed9d5975e 100644
--- a/Customizations/JSON/LayoutConfigJson.ts
+++ b/Customizations/JSON/LayoutConfigJson.ts
@@ -120,7 +120,7 @@ export interface LayoutConfigJson {
      *
      * E.g.: if there are two layers defined:
      * ```
-     * "layers"[
+     * "layers":[
      *  {"title": ..., "tagRenderings": [...], "osmSource":{"tags": ...}},
      *  {"title", ..., "tagRenderings", [...], "osmSource":{"tags" ...}}
      * ]
@@ -132,13 +132,19 @@ export interface LayoutConfigJson {
      *     "osmSource":{"geoJsonSource":"xyz"}
      * }
      * then the result will be that all the layers will have these properties applied and result in:
-     * "layers"[
+     * "layers":[
      *  {"title": ..., "tagRenderings": [...], "osmSource":{"tags": ..., "geoJsonSource":"xyz"}},
      *  {"title", ..., "tagRenderings", [...], "osmSource":{"tags" ..., "geoJsonSource":"xyz"}}
      * ]
      * ```
      *
-     * If the overrideAll contains a list where the keys starts with a plus, the values will be appended (instead of discarding the old list)
+     * If the overrideAll contains a list where the keys starts with a plus, the values will be appended (instead of discarding the old list), for example
+     *
+     * "overrideAll": {
+     *   "+tagRenderings": [ { ... some tagrendering ... }]
+     * }
+     * 
+     * In the above scenario, `sometagrendering` will be added at the beginning of the tagrenderings of every layer
      */
     overrideAll?: any;
 
diff --git a/Docs/Development_deployment.md b/Docs/Development_deployment.md
index 7762c7a9f..ffa69eab3 100644
--- a/Docs/Development_deployment.md
+++ b/Docs/Development_deployment.md
@@ -18,15 +18,14 @@
  Development
  -----------
  
- **Windows users**: All scripts are made for linux devices. Use the Ubuntu terminal for Windows (or even better - make the switch ;) )
+ **Windows users**: All scripts are made for linux devices. Use the Ubuntu terminal for Windows (or even better - make the switch ;) ). If you are using Visual Studio, open everything in a 'new WSL Window'.
  
  To develop and build MapComplete, yo
  
 0. Make sure you have a recent version of nodejs - at least 12.0, preferably 15
 0. Make a fork and clone the repository.
 1. Install `npm`. Linux: `sudo apt install npm` (or your favourite package manager), Windows: install nodeJS: https://nodejs.org/en/download/
-2. Run `npm install` to install the package dependencies
-3. Run `npm run init` and generate some additional dependencies and generated files
+3. Run `npm run init` and generate some additional dependencies and generated files. Note that it'll install the dependencies too
 4. Run `npm run start` to host a local testversion at http://localhost:1234/index.html
 5. By default, a landing page with available themes is served. In order to load a single theme, use `layout=themename` or `userlayout=true#<layout configuration>` as [Query parameter](URL_Parameters.md). Note that the shorter URLs (e.g. `bookcases.html`, `aed.html`, ...) _don't_ exist on the development version.