Add custom content element layouts in TYPO3

Question

In TYPO3 I want to add several custom content element layouts to the existing ones of the default content type "Header". The custom layouts should make it possible, to make a header that is originally an H1 header look like H2 or H3, for instance.

So I added this Typoscript code, that is supposed to add the additional options to the interface in the backend:

TCEFORM {
  tt_content {
    layout {
      altLabels {
        0 = abc
        1 = def
        2 = geh
        3 = Layout H1
        4 = Layout H2
        5 = Layout H3
      }
      removeItems = 6,7,8,9,10
    }   
  }
}

As well as this, that should add the CSS classes:

tt_content.stdWrap.innerWrap.cObject = CASE
tt_content.stdWrap.innerWrap.cObject {
    key.field = layout

    3 = TEXT
    3.value = like-h1

    4 = TEXT
    4.value = like-h2

    5 = TEXT
    5.value = like-h3
}

However, of my 3 additional layouts, only one is added to the interface in the backend:

No matter what I try, I can't get the other two layouts to be added to the dropdown list in the backend. What could be a reason for this?

Answer 1

By default there are only 4 Layouts (0 = Standard and 1-3 = Layout 1-3) . By using altLabels you can only rename existing layouts. So to get more Layouts you need to add them

TCEFORM.tt_content.layout {  
  addItems {
    4 = my Layout 4
    5 = my Layout 5
  }
}