Most eDiscovery projects typically contain many emails. If you have 500 GBs of documents to review, its likely that you don’t have a strong idea of the documents in your review environment. Who to Whom (About What) provides a heat map grid of emails that hit on your keyword with individual email senders on y axis and all email recipients on x axis. In a quick glance, red and orange boxes show the most common email correspondence in the data set.