Hotkey for moving list items?

I have a list of items in an ‘outline’ format on one page:
For example:
I. Test
A. Testing
1. Tested

Lets say I wanted to move “A. Testing” back to become II. Testing, is there a hotkey/something I can do to move it quickly without having to backspace a few times let it get to the above list and pressing enter? In Word it would be decrease paragraph indent?
I tried to read the manual it says ‘Shift’ or ‘Shift Tab’
However
Lets say for this :
I. Test
A. Testing
1. Tested
I were to press Tab at 1. Tested.
It ends up looking like this:

I. Test
A. Testing
B. Tested

A good example:
imgur.com/s92n1wL

Then if I hit ctrl+z to undo that, it gets worse.
Here is what it looks like when I hit ctrl+z:
imgur.com/t2ucri7

Thank you so much in advance for any help you can provide.