IntelliJ IDEA makes it possible to detach editor tabs, and move them to separate frames.
- Drag this tab outside of the main window. A preview thumbnail appears:

- Press ⇧F4 or ⇧F4⇧F4 or ⇧F4⇧F4 or ⇧F4⇧ F4, ⇧F4 or ⇧F4⇧ F4, ⇧F4 or ⇧F4.

The content of the editor tab opens in a separate frame.
- drag it from its frame and drop to the main IntelliJ IDEA frame until tab name appears:

- The detached editor tabs can be split or unsplit.
- You can move editor tabs between split panes.
