anchor.diff:  
   RESTORE TO DEFAULT THEME:: This action overwrites your modifications with the theme provided by default.
   
  -==== Simple configuration
  +=== Basic customization
   
  -Some simple customization options are:
  +Some basic customization options are:
   
   Images:: Add your logos.
   *Optional logo* is used for the home page and the footer, but you can override this to use same logo for everything by clicking *Use default logo*.
  
positive.code: :page-keywords: Gravitee.io, API Platform, API Management, API Gateway, oauth2, openid, documentation, manual, guide, reference, api
  :page-layout: apim3x
  
  == Mandatory configuration
  The only mandatory value in the `config.json` file is:
  
  [source,json]
  ----
  {
    "baseURL": "gravitee_portal_api_url"
  }
  ----
  
  It describes where the APIM API Portal endpoint is, and must be set so APIM Portal can send requests to it.
  
  == Default configuration
  
  [source,json]
  ----
  include::https://raw.githubusercontent.com/gravitee-io/gravitee-portal-webui/master/src/assets/config.json[]
  ----
  
  == Configure the APIM Portal theme
  You can change the default theme of APIM Portal to your own custom theme.
  
  === Using APIM Console
  
  You customize the theme in APIM Console with the *Settings > Theme* menu option.
  
  image::apim/3.x/installation/portal-ui/graviteeio-portal-configuration-theme.png[]
  
  Whenever you change a setting, you can see the change reflected in the live preview on the right.
  
  [NOTE]
  ====
  
negative.code: image::apim/3.x/installation/portal-ui/portal-url.png[]
  ====
  
  === Top menu
  FULLSCREEN:: This button opens the preview in a new window, making it easier to edit if you have several screens.
  NOTE: This button is only visible if you configure a Portal URL, as described above.
  
  