Datasets used Tables / Matrix

I am using SSRS 2012 and 2008R2 for development.

I try to find and couldn't locate any useful items over the net.
Hence posting here.

Sorry if the same questions has been asked in different manner.

I have got lots of Datasets and many Tables and Matrix in a single report.

How do i find which dataset is being used by which table / matrix. 

Also is there any other way to find the datasets used by particular table/matrix.

Pls let me know if the question is not clear

Thanks