Your question is very general so I will answer very generally.
You can modify the existing border or create new ones on the background sheets. Insert callouts or text with the desired properties.
@Krunal I doubt too many here are running SE Electrical which is basically Mentor Graphics, and there is no Mentor Graphics forums in the Community yet. You may have to consult support or the documentation to get your answer.
So I've clearly revealed my complete ignorance of SE Electrical. Yet another subject on which I'm lacking know-how.
You can creat a new border on Solid Edge Eletrical Symbols that comes with the Solid Edge Eletrical Design.
View the image that a sent
Adding more to f_silva's reply.
You can use existing border library and create a new border inside it. See the image:
Also launch help from Solid Edge Electrical Symbol application. You would find relevant info in chapter ' Border Drawings'.