diff --git a/README.md b/README.md
index 256ef95..7eac1cd 100644
--- a/README.md
+++ b/README.md
@@ -6,18 +6,18 @@
 6. [Conclusion](#conclusion)
 
 <a name="overview"></a>
-# Overview
+# 1. Overview
 
 This package provides an API for the Bind nameserver.
 It consists of two parts, the API itself and a CLI tool to configure the available functions.
 
 
 <a name="features"></a>
-# Features
+# 2. Features
 
-## CLI
+## 2.1. CLI
 
-![Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_cli.png)
+![CLI Interface](https://bindapi.24unix.net/assets/bindAPI_cli.png)
 
 The CLI is used to perform configuration and some checks:
 
@@ -30,7 +30,7 @@ The CLI is used to perform configuration and some checks:
   - Create: Adds a new panel to the configuration
   - Update: Changes one or more parameters of the panel
   - Delete: Deletes the given panel
-  - ApiPing: Calls the /ping endpoint of the given server
+  - ApiPing: Calls the /ping endpoint of the given server or all if no Panel is specified
   - some additional API call might be added
 * nameservers
   - similar to panels, but for the nameservers
@@ -39,14 +39,66 @@ The CLI is used to perform configuration and some checks:
 * apikeys
   - manage the keys to access this nameserver via API
 
-API
+# 2.2. API
+
+![OpenAPI](https://bindapi.24unix.net/assets/bindAPI_api1.png)
+
+The APi is a RESTful API, there is a self explaining Swagger/OpenAPI available.
+
+On the site you can authorize with an API key (creation of the key is described later in this document).
 
 
+![Authorize](https://bindapi.24unix.net/assets/bindAPI_api2.png)
+![Enter Apikey](https://bindapi.24unix.net/assets/bindAPI_api3.png)
 
+After successful authorization you can use the APi via the OpenAPI Interface, e.g. call the /ping endpoint to check if the API is alive.
 
+You have to click on „Try it out“:
+
+![Try it out](https://bindapi.24unix.net/assets/bindAPI_api4.png)
+
+Of course, you can issue the same command in your shell:
+
+`
+curl -X 'GET' \
+'https://ns1.24unix.net/api/ping' \
+-H 'accept: application/json' \
+-H 'X-API-Key: 61f27a57c9d1f.[truncated]'
+`
+
+A helpful tool when dealing with API is [Postman](https://https://www.postman.com/), if offers the same options as from the OpenAPI interface or via shell with curl.
+
+![Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_api5.png)
 
 <a name="installation"></a>
-# Installation
+# 3. Installation
+
+You can install the bindAPi on either a standalone server or an existing KeyHelp Panel.
+However, slave zones are only managed for masters which lie on Keyhelp panels.
+
+## 3.1. Installation on a KeyHelp panel
+
+In KeyHelp, install PHP 8.1.
+This is mandatory, the API relies on features only available since PHP 8.0.
+It might run on PHP 8.0 but has not been tested as there is no reason not to install PHP 8.1.
+
+So head over to:
+Settings => Configuration => Feature Settings => PHP Interpreter
+![Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_php1.png)
+
+
+Set the checkmark and press Save.
+
+Wait about a minute, the installation is started via a cronjob which runs every minute.
+![Install Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_php2.png)
+
+xxx
+![Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_php3.png)
+
+Next create a domain, e.g. ns1.24unix.net:
+
+![Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_php2.png)
+
 
 <a name="configuration"></a>
 # Configuration
@@ -57,20 +109,11 @@ API
 <a name="conclusion"></a>
 # Conclusion
 
-In KeyHelp, install PHP 8.1
 
-Settings => Configuration => Feature Settings => PHP Interpreter
-![Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_php1.png)
 
-![Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_php2.png)
-
-![Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_php3.png)
 
 ![Php Interpreter](https://bindapi.24unix.net/assets/bindAPI_php4.png)
 
-Set the checkmark and press Save.
-
-Wait about a minute, the installation is started via a cronjob which runs every minute.