diff --git a/docs/file-types.md b/docs/file-types.md
index 65cda445..be4dbca7 100644
--- a/docs/file-types.md
+++ b/docs/file-types.md
@@ -4,7 +4,9 @@ description: Steps to configure support for different image and video formats
 
 # File type support
 
-Memories supports the file types supported by the Nextcloud previews app. If you add support for any one of the file types below, you must run `occ memories:index` to index these files.
+Memories supports the file types supported by the Nextcloud previews app. File type support is determined in part by the values listed in the `enabledPreviewProviders` configuration parameter in your configuration file. If your `config.php` does not contain an `enabledPreviewProviders` array, this means you are using Nextcloud's defaults. Copy the array over from `config.sample.php` before adding any of the values below, or else you will effectively disable all of the defaults.
+
+If you add support for any one of the file types below, you must run `occ memories:index` to index these files.
 
 ## Common Formats
 
@@ -15,40 +17,43 @@ GIF (image/gif)
 BMP (image/bmp)
 ```
 
-These are enabled by having the following in your `config.php`,
+These are enabled by inclusion of the following values in `config.php`'s `enabledPreviewProviders` array:
 
 ```php
-'enabledPreviewProviders' =>
-array (
-  'OC\\Preview\\Image',
-),
+  'OC\Preview\Image',
+```
+
+... or...
+
+```php
+  'OC\Preview\PNG',
+  'OC\Preview\JPEG',
+  'OC\Preview\GIF',
+  'OC\Preview\BMP',
+  'OC\Preview\XBitmap',
 ```
 
 ## HEIC and TIFF
 
-You must enable `HEIC` and `TIFF` in Nextcloud `config.php`, and install Imagemagick (included in the official Nextcloud docker image)
-
-In `config.php`, add,
+These are enabled by inclusion of the following values in `config.php`'s `enabledPreviewProviders` array:
 
 ```php
-'enabledPreviewProviders' =>
-array (
-  'OC\\Preview\\HEIC',
-  'OC\\Preview\\TIFF',
-),
+  'OC\Preview\HEIC',
+  'OC\Preview\TIFF',
 ```
 
+You must also install Imagemagick (included in the official Nextcloud docker image).
+
 ## Videos
 
-You need to install `ffmpeg` and add the video config to `config.php`
+These are enabled by inclusion of the following value in `config.php`'s `enabledPreviewProviders` array:
 
 ```php
-'enabledPreviewProviders' =>
-array (
-  'OC\\Preview\\Movie',
-),
+  'OC\Preview\Movie',
 ```
 
+You must also install `ffmpeg` and add the video config to `config.php`.
+
 ## RAW images
 
 Install the [camera raw previews](https://github.com/ariselseng/camerarawpreviews) app from the Nextcloud app store.