I received an email from my friend Ute, a PowerPoint MVP from Germany who directed me to one of her video tutorials with the clue that “strg” means CTRL.
You can watch the tutorial here (it is in German).
Here is my sample chart. Note the full selection line around it when clicked.
But if you CTRL CLICK on the chart you get a different selection, 4 dots.
With the CTRL CLICK selection the arrow keys allow you to move the chart!
– Troy @ TLC