You are asking abt shelf in tableau.
In worksheet we have lot of shelf like Row shelf, column shelf, marks shelf, filter shelf and page shelf.
when we use the line in marks then path will appear.
see here. Using the Path Shelf for From - To Pattern Analysis
You Might be correct here Sankar. This could be Path Shelf... But, My friend stressed it as Path Cell..So, I am wondering is there something that exists in Tableau which i might not be aware of..
Thanks for your prompt response. It's cleared now ..:)