How to enable subheader field in tt_content

In order to enable "subheader" field in tt_content you can follow the procedure:

1. 1) Enable “subheader” field in all different tt_content types (or you can decide for a specific type). Go in TSREF Setup (Typoscript) and paste the following lines of code:
   

   //——ENABLE SUBHEADER———–
   lib.subheader = TEXT
   lib.subheader {
   field = subheader
   required = 1
   dataWrap = <h5 class=“subheader subheaderlayout-{field:layout}”>|</h5>
   htmlSpecialChars = 1
   editIcons = tt_content:subheader,layout
   editIcons.beforeLastTag = 1
   editIcons.iconTitle.data = LLL:EXT:css_styled_content/pi1/locallang.xml:eIcon.subheader
   prefixComment = 2 | Subheader:
   }
   //—————————————–
   tt_content.header {
   20 >
   20 < lib.subheader
   }
   tt_content.text { 
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.image {
   15 = TEXT
   15 < lib.subheader
   } 
   tt_content.textpic {
   10.15 = TEXT
   10.15 < lib.subheader
   }
   tt_content.bullets {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.table {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.uploads {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.table {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.multimedia {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.swfobject {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.qtobject {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.media {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.search {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.login {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.splash {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.menu {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.shortcut {
   15 = TEXT
   15 < lib.subheader
   }
   tt_content.list {
   15 = TEXT
   15 < lib.subheader
   }

2. 2) Now you need to enable the field in TCA of TYPO3. (typo3conf/extables.php) Go in typo3conf and add the following lines of code in “extTables.php” file:
   

   #re-enabling subheader in tt_content
   t3lib_div::loadTCA('tt_content'); 
   t3lib_extMgm::addToAllTCAtypes("tt_content", 'subheader;;', 'text,textpic', 'before:bodytext');