Set your screen to Full Screen.
I looked for that the buttons on the base of toolbar are gone?
F key should work to cycle through them...
Just so you know, the correct terminology is the "Panning Tool", which is represented by a "Hand" icon.
Yes, there are limitations when the app is in windowed view to panning a document around when it's already completely shown on the screen. But these are not new. This behavior hasn't changed since at least as far back as Photoshop 6.0 (I just tested it).