Initial provider option docs for the preset.

website/src/docs/transloadit-preset-picker.md

@@ -5,15 +5,71 @@ permalink: docs/transloadit-preset/picker/
 hidden: true
 ---
 
+Show a modal UI that allows users to pick files from their device and from the web. It uploads files to Transloadit for processing.
+
 ```js
-transloadit.pick(target, options)
+const resultPromise = transloadit.pick(target, {
+  params: {
+    auth: { key: '' },
+    template_id: ''
+  }
+})
 ```
 
 ## `target`
 
 DOM element or CSS selector to place the modal element in. `document.body` is usually fine in this case because the modal is absolutely positioned on top of everything anyway.
 
-<!-- This supports the same options as the Transloadit plugin … should we inline the documentation somehow? Or just link to it? -->
-## `options.params`
+## Providers
+
+Providers import files from third party services using [Uppy Companion][companion] or from local sources like the device camera.
+
+By default, the Picker will use Transloadit's [Uppy Companion][companion] servers for imports from third party service. You can self-host your own instances as well.
+
+### `providers: []`
+
+Array of providers to use. Each entry is the name of a provider. The available ones are:
+
+- `'dropbox'` – Import files from Dropbox using [Uppy Companion][companion].
+- `'google-drive'` – Import files from Google Drive using [Uppy Companion][companion].
+- `'instagram'` – Import files from Instagram using [Uppy Companion][companion].
+- `'url'` – Import files from public Web URLs using [Uppy Companion][companion].
+- `'webcam'` – Take photos and record videos using thee user's device camera.
+
+### `serverUrl: Transloadit.COMPANION`
+
+The URL to a [Uppy Companion][companion] server to use.
+
+### `serverPattern: Transloadit.COMPANION_PATTERN`
+
+The valid and authorised URL(s) from which OAuth responses should be accepted.
+
+This value can be a `String`, a `Regex` pattern, or an `Array` of both.
+
+This is useful when you have your [Uppy Companion][companion] running on multiple hosts. Otherwise, the default value should do just fine.
+
+### `serverHeaders: {}`
+
+Custom headers to send to [Uppy Companion][companion].
+
+### `dropbox: {}`
+
+Specific options for the [Dropbox](/docs/dropbox) provider.
+
+### `googleDrive: {}`
+
+Specific options for the [Google Drive](/docs/google-drive) provider.
+
+### `instagram: {}`
+
+Specific options for the [Instagram](/docs/instagram) provider.
+
+### `url: {}`
+
+Specific options for the [URL](/docs/url) provider.
+
+### `webcam: {}`
+
+Specific options for the [Webcam](/docs/webcam) provider.
 
-The Assembly paramaters to use for the upload. [see here](https://uppy.io/docs/transloadit#params)
+[companion]: /docs/companion

website/src/docs/transloadit-preset-upload.md

@@ -5,7 +5,6 @@ permalink: docs/transloadit-preset/upload/
 hidden: true
 ---
 
-
 Upload files straight to Transloadit from your own custom UI. Give us an array of files, and we'll give you an array of results!
 
 ```js