diff --git a/dev-docs/README.md b/dev-docs/README.md
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@@ -9,3 +9,17 @@ This file contains notes taken during software development. These notes may even
 - [minimal-slp-wallet](https://www.npmjs.com/package/minimal-slp-wallet) is used to access tokens and BCH on the Bitcoin Cash blockchain.
 - A 'server selection' dropdown allows the user to select from an array of redundent back end servers.
 - This site is statically compiled, uploaded to Filecoin, and served over IPFS for censorship resistance and version control.
+
+## File Layout
+
+The top-level file layout of this app looks like this:
+
+- App.js - the main application orchestates these child components:
+  - GetRestUrl - retrieves the REST URL for the selected back-end web3 server from query paramenters in the URL.
+  - LoadScripts - Loads the modal with a waiting spinner animation until the external script files are loaded.
+  - NavMenu - the collapsible navigation menu
+  - InitializedView & UnitializedView - the default Views that are displayed depending on the state of the app.
+  - ServerSelect - allows the user to select a different web3 back end server.
+  - Footer - Footer links
+
+After initialization, the InitailizedView is displayed. This loads the AppBody, which is a wrapper for each View. Views are selected using the navigation menu. When one View is selected, the others are hidden.