Filters can be used on the Inbox tab to make it easier to find inboxes within your company. 

The standard filters can be found along the top as drop down menus. Additional filters can be added using the Add a filter button. 

Inboxes can be searched for using the Search inbox bar.

The columns can be reordered based on each heading by clicking the row heading and each one can be moved to a different position by dragging and dropping the column. Additionally, columns can be removed from view so that less information is being displayed, to do this click the settings wheel.