When having multiple editor groups, they take the same space in VSCode. For example, if I have 2 vertical groups, each one takes 50% of my screen. Now, if I double click on a file name in the group e.g. 2, this group takes about 70% of my screen and becomes bigger, so I can see the code better. If I double click again, both groups will be 50-50 again.
What is this feature called? What's the shortcut key for it?

