Question: In eclipse, the bottom right corner of each file has a "scroll arrow" so you can scroll down one line at a time by clicking it. It looks like this:

![enter image description here](https://i.stack.imgur.com/8dmY0.png)

Does anyone know if that is something that can be enabled in Idea? I haven't been able to find it yet...

Answer: 
I don't think there's any UI element for this, but there are keyboard shortcuts:

* Windows: `Ctrl`+`↑` or `Ctrl`+`↓` (I think it's this)
* Mac: `⌘`+`↑` or `⌘`+`↓`

This scrolls up or down (respectively) one line without moving the caret.
It works with `fn` + ↑ Or `fn` + ↓ key for me on Mac. It scrolls up/down one page at a time. Moves the caret as well, not sure if you were looking for something like this.