I see in YouTube videos on blender that there is something called a manipulator. This allows for dragging and scaling on an axis. I cannot find this manipulator on my version of Blender. Here is a picture of what I am talking about:
[![enter image description here](https://i.stack.imgur.com/6E7x0.png)](https://i.stack.imgur.com/6E7x0.png)

How do I get that manipulator to show up in Blender 2.90?
This is the link to the video where I took this [screenshot](https://www.youtube.com/watch?v=JJkxGNW8JZU).