Open your logic window and then open your trend. Those should appear as two tabs in the same window. Click on one of them and drag them until you see a new window appear. I typically drag to the left until the cursor passes into the space for the Controller Organizer. Then the new window appears quickly. That new window can be sized and positioned as you wish. If you do this for the logic and the trend then you can move and position both of them as needed.
In older versions of the software (before v31) they had a tile (under the Window menu) feature that made this much easier.
OG