Why doesn’t the gradient tool appear over the object I’ve applied it to in Illustrator CS6? I have to click and hold down to adjust the size of the gradient on an object or just use the gradient window. But now I am unable to edit the perimeters of a radial gradient like I use to do in CS5. In CS5 the bar would stay visible over the object until you clicked out of the gradient tool. Is my software bugged or is this simply a disappointing new feature in CS6?
Kind of late but hope my answer can be of help.
So the control that you are looking for is called the “Gradient annotator” can might be switched off accidentally by pressing the shortcut “cmd + opt + G” for mac. Not so sure about Windows.
To reactivate it simply press the shortcut again or go to View > Show Gradient Annotator and you should have the gradient controls back on.