Seems like several things are missing.
No. They have been changed! RTFM (which these days is in one example, found in the URLs provided)
The Hand Tool — The Hand tool has been relocated in the lower right of the ACR interface.
•With most other tools selected, pressing the Spacebar will temporarily access the Hand tool.
The Zoom Tool — The Zoom tool’s default behavior has been modified – click in the image area to toggle between Fit in View and 100%.
• If you prefer the Zoom tool to automatically swap to the hand tool when zoomed into 100%, click the Settings icon (the gear) and choose General > Zoom and Pan and enable “Use Lightroom Style Zoom and Pan”.
• When moving from one image to another in the filmstrip, the zoom percentage and location will stay constant. To vary the zoom between images disable Global Zoom Editing from the Zoom Level popup in the lower left.