[‘showitem’] section

This string is used for rendering the form in the user setup module. It contains a comma-separated list of fields, which will be rendered in that order.

To use a tab insert a --div--;LLL:EXT:foo/... item in the list.

Example (taken from typo3/sysext/setup/ext_tables.php):

'showitem' => '--div--;LLL:EXT:setup/Resources/Private/Language/locallang.xlf:personal_data,realName,email,emailMeAtLogin,avatar,lang,
            --div--;LLL:EXT:setup/Resources/Private/Language/locallang.xlf:passwordHeader,passwordCurrent,password,password2,
            --div--;LLL:EXT:setup/Resources/Private/Language/locallang.xlf:opening,startModule,
            --div--;LLL:EXT:setup/Resources/Private/Language/locallang.xlf:editFunctionsTab,edit_RTE,resizeTextareas_MaxHeight,titleLen,edit_docModuleUpload,showHiddenFilesAndFolders,copyLevels,resetConfiguration'