It would be great if we can hide the inspector temporally. Specially f.e a quick repair when you need it at a clients space and you have only one screen ( powerbook ), or for people with just one or two screens. Both, a collapsable button or double click on title bar are ok , as long we can hide it temporally.
<rdar://problem/15112764>
*** This bug has been marked as a duplicate of bug 14361 ***