iTerm2: how to return a split pane to a tab?

Question

When working with multiple tabs in fullscreen mode, I often split a iTerm pane by dragging an open iTerm tab to the active pane.

However, once I split the pane, I cannot find a way to return the split pane back to a tab. Is there a way to do this? Or is there a different way to accomplish what I am seeking?

Answer 1

Select "Move Session to Split Pane" in the context menu, then click the pane. Now you can drag the title bar of the pane.

Although I don't understand why it works.

Answer 2

I've been able to do it by "Move Session to Window" on the pane with the session you want to keep; "New Tab" in the new window; drag the tab you want over to another window; then close the extra window.