After creating a new CITI for a job to add the begin string and end string i can't find the levelin thing which i have highlighted

Hi all,

when I am adding a new style file (CITI) to my job (Version -SDL XPP8.4)

to add the beginning string and end string I can't find this levelin field which I have highlighted in the picture.

Can anyone please help me to add this levelin field in the CITI spec.