Update customize block page procedure

Author: maxvp

src/content/partials/cloudflare-one/gateway/customize-block-page.mdx

@@ -7,18 +7,14 @@ You can customize the block page by making global changes that will show up ever
 To apply customizations to your block page:
 
 1. In [Zero Trust](https://one.dash.cloudflare.com), go to **Settings** > **Custom Pages**.
-
-2. Under **Block page**, turn on **Use the customized block page over Cloudflare's default**.
-
-3. Select **Customize**. Available global customizations include:
-
-   - Adding your organization's name
-   - Adding a [logo](/cloudflare-one/policies/gateway/block-page/#add-a-logo-image)
-   - Adding a header text
-   - Adding a global block message, which will be displayed above the policy-specific block message
-   - Adding a [Mailto link](/cloudflare-one/policies/gateway/block-page/#allow-users-to-email-an-administrator)
-   - Choosing a background color
-
+2. Under **Account Gateway block page**, select **Customize**.
+3. Choose **Custom Gateway block page**. Gateway will display a preview of your custom block page. Available global customizations include:
+   - Your organization's name
+   - [Logo](/cloudflare-one/policies/gateway/block-page/#add-a-logo-image)
+   - Header text
+   - Global block message, which will be displayed above the policy-specific block message
+   - [Mailto link](/cloudflare-one/policies/gateway/block-page/#allow-users-to-email-an-administrator)
+   - Background color
 4. Select **Save**.
 
 Users will now get a custom block page when visiting a blocked website.