My first problem is the toolbar. My toolbar is hidden and not showing File, Edit etc..
By mistake I just remove the center image to get the tool bar but the timeline covers my model working area now and it's now re-sizing. When I drag my mouse pointer to that bar where pointer changes to up, down arrows to re-size the window, but when I click and drag pointer to make my working area bigger and timeline smaller than nothing works, the areas are not moving, just split in more and join.