More default pages content into an include and add to Page config docs

_includes/snippets/default-pages.md

@@ -0,0 +1,17 @@
+Folder default pages are **.md** files that will be treated as the index (default) page of the folder.
+
+Retype will search using the following case insensitive priority:
+
+1. `index.md`
+2. `readme.md`
+3. `default.md`
+4. `welcome.md` *only in the project root
+
+Within a sub-folder, if you add a Markdown **.md** file with the exact same name as the folder name, Retype will also treat that `.md` as a default page. For instance, given the following basic project structure, the **/sample/sample.md** file will function as a default page for the folder. The result will be the same as though you named it **/sample/index.md**:
+
+```
+sample
+  |-- sample.md
+readme.md
+retype.yml
+```

configuration/page.md

@@ -19,6 +19,10 @@ order: 100
 This is a sample page demonstrating page metadata.
 ```
 
+## Default pages
+
+{{ include "snippets/default-pages.md" }}
+
 ## Separate .yml file
 
 If you would prefer to keep the page metadata separated and placed outside of the **.md** content page, the config can be moved into a paired **.yml** file.

configuration/reserved_words.md

@@ -59,16 +59,7 @@ If you manually create a **CNAME** file within the root of the [input](/configur
 
 ### Default pages
 
-Folder default pages are custom **.md** files that will be treated as the index page of the folder.
-
-Retype will search using the following case insensitive priority:
-
-1. `index.md`
-2. `readme.md`
-3. `default.md`
-4. `welcome.md` *only in the project root
-
-For instance, creating a the file **docs/index.md** will create a custom page accessible from the path `https://example.com/docs/`. The **index.md** page instructs Retype to create an **index.html** file within the **docs/** folder.
+{{ include "snippets/default-pages.md" }}
 
 ### Project config