IntelliJ: Is there a way to split tool windows horizontally?

Question

In IntelliJ I would like to have "project" and "structure" tool windows side by side horizontally, not vertically. Is this possible?

Answer 1

I found the solution in this question: Switching from Eclipse to IntelliJ: Is there a way to split tool windows?

In short, you need to go in to the File -> Settings -> Appearance and Behavior -> Appearance: and check "Side-by-side layout on the left."

Truly a UI failure on IntelliJ's part; that should very obviously be a checkbox on the tool window UI, not a setting!