[preya2k]

This has been around for a while. An app called Loom had this like a year ago. You can look at it here: https://www.youtube.com/watch?v=3B8KTDqCKx8

App is not available anymore, because it got acquired by Dropbox.

[ukd1]

I'm pretty sure that they would have patented it too. Guess we'll find out if this gets pulled.

[ttty]

But nobody shows how to scroll in select mode.

Edit:

>Tested it out. Using spreadsheet terms, it seems that when you want to select A1 to A2 it will scroll unless you have already started a horizontal select. The whole workflow is actually really nice and smooth. I personally like it. I would recommend others to try it out.