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As presented above structure is hierarchical, which means when you click on a listed project (A), you are to be presented what happened in time in regards to particular company (B). Each company lists within its members (C). After clicking member's name list expands and presents action that happened in regards to particular one.
Both views (tree list view and the default one) contain the same set of columns, marked on the first graphics (with numbers 3 - 7), as well as an eye symbol (2). Upon clicking on it, you can quickly spot what has been changed and compare it with previous version (green color is the new, current version content, while red the previous one):
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