Configuring the Studio Preview Slider - CMCC 10

Last updated 2 months ago

Learn how to configure the Preview Slider tool in CoreMedia Studio

This guide applies to CMCC 10

This how-to guide has yet to be updated for the most recent product release. Some of the elements in this guide might not work as described, if you are on the latest version.

Thank you for your patience!

LightbulbWhat you'll learn

  • How to configure the settings for the responsive slider, integrate metadata tags in FreeMarker templates and perform the configuration in Studio.

Person reading a bookPrerequisites

  • Frontend Workspace

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Reading time: 2 to 4 minutes

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This guide is for Developers.


CoreMedia Studio’s preview features a slider tool. The slider tool was built to let the user choose between devices with different resolutions in order to let the preview perform a responsive transformation of the page in the preview window. This means, that the preview will show the page as if it was to be viewed on a device with a different resolution than a "conventional" desktop display (a mobile device for instance).

Studio GUI PreviewSlider Shot

How to configure the preview CAE

In order to enable the responsive slider functionality, you have to enable the use of metadata tags within the FreeMarker templates. These tags are used for communication between the CAE and CoreMedia Studio in order to exchange meta information about the previewed page. (See CoreMedia Studio Developer Manual for more details about metadata tags). The following listing illustrates the enabled setting within the file cae-preview-app/src/main/resources/


The settings for the responsive slider can also be configured for each theme individually. Therefore, they are assigned in the theme’s settings Json files. For more information, please refer to the CoreMedia Frontend Manual.

How to integrate metadata tags in FreeMarker templates

The following example illustrates the use of metadata tags in the Page.body.ftl template.

<#ftl strip_whitespace=true>

  <#-- responsive design slider information for studio -->
    <#assign sliderMetadata={
            "cm_preferredWidth": 1281,
            "cm_responsiveDevices": {
    <#-- list of the devices.
    naming and icons see:
    the default icons are in studio-core, but you can define
    your own style-classes in slider-icons.css.
    <#-- e.g. iphone4 -->
      "mobile_portrait": {
      "width": 320,
      "height": 480,
      "order": 1,
      "isDefault": true
    <#-- e.g. iphone4 -->
      "mobile_landscape": {
      "width": 480,
      "height": 320,
      "order": 2
    <#-- e.g. nexus7 -->
      "tablet_portrait": {
      "width": 600,
      "height": 800,
      "order": 3
    <#-- e.g. ipad -->
      "hybrid_app_portrait": {
      "width": 768,
      "height": 1024,
      "order": 4
    <#-- e.g. nexus7 -->
      "tablet_landscape": {
      "width": 960,
      "height": 540,
      "order": 5
    <#-- e.g. ipad -->
      "hybrid_app_landscape": {
      "width": 1024,
      "height": 768,
      "order": 6

To introduce new devices with even different resolutions, simply extend the content of the file appropriately.

Configuration in Studio

The configuration in Studio has to be made in the appropriate bundle files. The following listing shows the content of the file apps/studio-client/modules/studio/blueprint-forms/src/main/joo/com/coremedia/blueprint/studio/

      Device_mobile_portrait_icon=Resource(key='channel_mobile_portrait', bundle='com.coremedia.icons.CoreIcons')
      Device_mobile_landscape_icon=Resource(key='channel_mobile_landscape', bundle='com.coremedia.icons.CoreIcons')
      Device_tablet_portrait_icon=Resource(key='channel_tablet_portrait', bundle='com.coremedia.icons.CoreIcons')
      Device_tablet_landscape_icon=Resource(key='channel_tablet_landscape', bundle='com.coremedia.icons.CoreIcons')
      Device_notebook_icon=Resource(key='channel_notebook', bundle='com.coremedia.icons.CoreIcons')
      Device_desktop_icon=Resource(key='channel_desktop', bundle='com.coremedia.icons.CoreIcons')
      Device_hybrid_app_portrait_icon=Resource(key='channel_tablet_portrait', bundle='com.coremedia.icons.CoreIcons')
      Device_hybrid_app_landscape_icon=Resource(key='channel_tablet_landscape', bundle='com.coremedia.icons.CoreIcons')

      Device_hybrid_app_portrait_text=Hybrid App
      Device_hybrid_app_landscape_text=Hybrid App

The configuration, which is relatively straightforward, consists of two parts.

  1. The appropriate icons, that will be displayed for the according device type in the slider (top part).

  2. The bottom part defines the text, that will be shown next to the slider.

This configuration can be extended to introduce new device types with new device icons. For configuring the device icons, perform the following step:

  • Declare a new class for the configured icon name in the file apps/studio-client/modules/studio/blueprint-forms/src/main/resources/META-INF/resources/joo/resources/css/slider-icons.css.

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