While working on a plan I noticed that the navigator had disappeared. Thinking I must have accidentally closed it, I opened it again and started back to work. However, each time I even click in the plan view, it disappears again. Any one know what's happening? (This is in AC13)
AC19(9001), 27" iMac i7, 12 gb ram, ATI Radeon HD 4850 512mb, OS 10.12.6