The area in the middle of the bottom part of the main screen is empty when restarting a saved game. This is the area tha normally has the graphs for population, economy, influence, etc., or the data for a selected planet or ship. While clicking on empty space in the main viewing area will bring up the graphs, or clicking on a planet or ship will bring up the data for those entities, the default should be the graph data mode from the time of the saved game.