Running through the tutorial on SW2018.  At the point where I merely have to rotate a pin 90 degrees by using the Move with Triad.

The steps state to right click the center of the sphere of the triad and select  "Show Rotate Delta XYZ Box".

This all goes well, until I attempt to type within the box to change the value to 90. The box simply disappears, and I have to once more right click the pin, select "move with triad", and when the "show rotate delta xyz box" appears, I cannot type within it to change any value. It simply disappears.

Any ideas? Seems like a pretty simple routine, and I realize there are other ways to rotate the part, but for some reason I cannot type within that box or change any of the x, y, or z values.  Once I try to click inside the little box to change the value, the box itself disappears....

Here are the steps directly from the tutorial. I have marked the point where the "Show Rotate Delta XYZ Box" "disappears"..

Rotate the pin so it is vertical.

1. Right-click the pin and
   select Move with Triad
2. Right-click the center
   sphere of the triad and select Show Rotate Delta XYZ
   Box.
3. In the box: <------------
   1. Type 90 for DeltaX. ( this is where the box closes and does not allow me to type within it )
   2. Click OK three times, so the pin is vertical.
4. Click anywhere in the
   graphics area to close the box.

Thanks for any help you can provide. I am not sure if there is a setting I need to change or whuuut....