Hello Punith,

After investigating this and doing some research, collapse and expand with +/- has been determined to be a product idea. You can suggest new product ideas for future versions by submitting it at the following link: Product Ideas

Remember when submitting your idea to explain the context in which a feature would be used and why it is needed as well as anything that would prevent you from accomplishing this today. You can even add screenshots to build a stronger case.  You can also link back to this thread for additional details.
Thank you in advance to submitting your product idea.

Include a link to this thread in your idea so product management will be able to look back at this case.