As I've posted before, I hate inspectors.
They're OKish while you have something selected, as then they contain useful info which, after all, would take up space
somewhere however you displayed it, but unless you let them appear over the top of the main window, which means you'll end up dragging them about, they still waste huge amounts of space:
Select nothing, and the wasted space becomes criminal:
Drawers suffer the same problem, though they can show and hide automatically. However, that involves re-sizing the entire window dynamically unless you have spare room anyway.
The solution is inline info - select an item and it expands to show it's info without needing to resize the main window, deselect, and all items collapse.
Mark