diff --git a/README.md b/README.md
index 6978cf9..5ba9c5d 100644
--- a/README.md
+++ b/README.md
@@ -2,14 +2,20 @@
 
 The [Cleura Cloud Launch Pad](https://github.com/cleura/launch-pad) repository contains a set of essential orchestration configurations you can use to bootstrap a virtual environment on Cleura Cloud.
 
+## Supported frameworks
+
 We support these orchestration frameworks:
 
 * [OpenStack Heat](https://docs.openstack.org/heat/)
 * [Ansible](https://docs.ansible.com/) (with the [`openstack.cloud`](https://docs.ansible.com/projects/ansible/latest/collections/openstack/cloud/) collection)
 * [OpenTofu](https://opentofu.org/docs/) (with the [`openstack`](https://search.opentofu.org/provider/terraform-provider-openstack/openstack/) provider)
 
+## Prerequisites
+
 Building a Launch Pad requires a [Cleura Cloud account](https://docs.cleura.cloud/kna1/howto/getting-started/create-account/), and a valid [set of OpenStack API credentials](https://docs.cleura.cloud/kna1/howto/getting-started/enable-openstack-cli/).
 
+## What's in a Launch Pad?
+
 Building a Launch Pad results in the creation of these resources:
 
 * A Secure Shell keypair (created from a public key you specify).
@@ -23,6 +29,41 @@ To check out the Launch Pad repository, run this command:
 git clone https://github.com/cleura/launch-pad
 ```
 
+## Building your Launch Pad
+
 For specifics building a Launch Pad using the orchestration platform of your choice, see the additional notes on [Heat](heat.md), [Ansible](ansible.md), and [OpenTofu](tf.md).
 
+### Configuration options
+
+You can tweak a Launch Pad's configuration by setting options.
+Depending on your selected configuration framework, these options are either *parameters* (OpenStack Heat) or *variables* (Ansible, OpenTofu).
+
+Every Launch Pad requires that you specify one option:
+
+| Parameter        | Type   | Purpose                             |
+|------------------|--------|-------------------------------------|
+| `ssh_public_key` | String | Your Secure Shell (SSH) public key. |
+
+All others come with reasonable defaults:
+
+| Parameter           | Type    | Purpose                                                                                                       | Default                            |
+|---------------------|---------|---------------------------------------------------------------------------------------------------------------|------------------------------------|
+| `enable_ipv6`       | Boolean | Whether to enable IPv6 in your Launch Pad.                                                                    | `true`                             |
+| `image`             | String  | The base operating system image to use for your Pad Ramp.                                                     | `Ubuntu 24.04 Noble Numbat x86_64` |
+| `ipv4_allow_access` | String  | An IPv4 address or network from which to allow SSH access to your Pad Ramp.                                   | `0.0.0.0/0` (allow from anywhere)  |
+| `ipv4_subnet_cidr`  | String  | The network address for your new private network, in CIDR notation. This can be any RFC 1918 private network. | `192.168.101.0/24`                 |
+| `ipv6_allow_access` | String  | An IPv6 address or network from which to allow SSH access to your Pad Ramp.                                   | `::/0` (allow from anywhere)       |
+
+Additional options are available, but you should normally set them only if advised by Cleura's Service Center:
+
+| Parameter         | Type    | Purpose                                                                         | Default            |
+|-------------------|---------|---------------------------------------------------------------------------------|--------------------|
+| `flavor`          | String  | Your Pad Ramp's instance flavor (a measure of its CPU core and RAM allocation). | `b.2c2gb`          |
+| `ipv6_mode`       | String  | The IPv6 address assignment and router advertisement mode for your network.     | `slaac`            |
+| `ipv6_subnetpool` | String  | The IPv6 subnetpool from which your IPv6 subnet is created.                     | `ipv6_tenant_pool` |
+| `public_net`      | String  | The network name from which your Pad Ramp gets a public IPv4 address.           | `ext-net`          |
+| `volume_size`     | Integer | The size of your Pad Ramp's boot device (in GiB).                               | 10                 |
+
+## Where to go from here
+
 Once you have built your Launch Pad, you can [launch further resources from it](https://docs.cleura.cloud/kna1/howto/getting-started/launching-resources/).