ds-site/Configuration/PageTSconfig/Mod/Wizards/0_NewContentElement.tsconfig

mod.wizards.newContentElement.wizardItems {
    common {
        show = text, image, video

        elements {
            image {
                tt_content_defValues {
                    header = Image
                    header_layout = 100
                }
            }
        }
    }
    menu {
        show = menu_abstract, menu_subpages
    }
    special {
        show =
    }
    forms {
        show =
    }
    plugins {
        show =
    }
}
TCEFORM.tt_content {
    CType {
        keepItems := addToList(text, image, video, menu_abstract, menu_subpages)
    }
}