[TASK] Overhaul subpage layout

Releases: main, 13.4

Author: linawolf

Documentation/ContentMapping/SubpageLayout.rst

@@ -6,38 +6,3 @@
 =========================
 Additional subpage layout
 =========================
-
-Edit the file :file:`TwoColumns.html` in the same directory. Exchange the
-main content area just as we have done before with the default template. Now
-replace the content area of the sidebar with the content elements in the Fluid
-variable :html:`{sidebarContent}`.
-
-You can compare your result to the example in our site extension:
-`TwoColumns.html <https://github.com/TYPO3-Documentation/TYPO3CMS-Tutorial-SitePackage-Code/blob/main/Resources/Private/Templates/Page/TwoColumns.html>`_.
-
-..  contents::
-
-.. _cm-switch_backend_layout:
-
-Switch to the two column layout with a sidebar
-==============================================
-
-You can switch the used page backend layout in the page properties at
-:guilabel:` Appearance >  Page Layout > Backend Layout`. Edit the page
-properties of your page to use the backend layout "Two Columns".
-
-..  include:: /Images/AutomaticScreenshots/SwitchBackendLayout.rst.txt
-
-After saving you will see that the content of the columns "main" and
-"jumbotron" remains unchanged while there is a third column "sidebar".
-This is due to the fact that the backend layout "Default" and "TwoColumns"
-use the same colPos number for these columns.
-
-..  include:: /Images/AutomaticScreenshots/BackendLayoutTwoColumns.rst.txt
-
-Enter some content to the sidebar. You could for example use the content element
-"Menu of subpages" to display a menu in the sidebar.
-
-Preview the page once more. A sidebar will appear in the frontend:
-
-..  include:: /Images/AutomaticScreenshots/TwoColumnsPreviewPage.rst.txt