How to unlock or unanchor an image

I believe your answer is below. Locked and anchored are not the same thing, so the options to manage a locked object would not be available for an anchored object. Anchored objects are also sometimes blocked from direct access as in the first answer, so the solution is — or should be — as below: click the object, right-click on the anchor icon, select Anchored Options, and click Release. (The other choice, Anchored Options, lets you set all the parameters for the image positioning, locking, etc.)