Using CS6. In the artboard window, I select an artboard tool icon next to an artboard. The artboard displays selected, with the usual grab handles at corners and the middle of sides that in Adobe-world always signal that an object can be resized. I am unable, however, to select the grab handles. When I try to do so, "beep."
An Artboard Options panel has also opened. i can resize the artboard by changing the Width and Height, but I have to guess what I want. If I close this panel, the grab handles go away.
What is going on?