Clarify docs

website/site/content/docs/configuration-options.md

@@ -77,6 +77,7 @@ The `collections` setting is the heart of your Netlify CMS configuration, as it
 - `delete`: `false` prevents users from deleting items in a collection; defaults to `true`
 - `extension`: see detailed description below
 - `format`: see detailed description below
+- `frontmatter_delimiter`: see detailed description under `format`
 - `slug`: see detailed description below
 - `fields` (required): see detailed description below
 
@@ -99,7 +100,8 @@ You may also specify a custom `extension` not included in the list above, as lon
 - `yaml-frontmatter`: same as the `frontmatter` format above, except frontmatter will be both parsed and saved only as YAML, followed by unparsed body text. The default delimiter for this option is  `---`.
 - `toml-frontmatter`: same as the `frontmatter` format above, except frontmatter will be both parsed and saved only as TOML, followed by unparsed body text. The default delimiter for this option is  `+++`.
 - `json-frontmatter`: same as the `frontmatter` format above, except frontmatter will be both parsed and saved as JSON, followed by unparsed body text. The default delimiter for this option is  `{` `}`.
-- `frontmatter_delimiter`: if you have an explicit frontmatter format declared, this option allows you to specify a custom delimiter like `~~~`.
+
+`frontmatter_delimiter`: if you have an explicit frontmatter format declared, this option allows you to specify a custom delimiter like `~~~`.
 
 
 ### `slug`