What is the keystroke to exit the file diff view in sublime text?

Question

I am playing around with sublimerge. I got into the file diff view, having 2 panes. I don't know how to go back to the normal view.

Answer 1

You can open a new window with Shift + Ctrl + N. It should open in one-pane view.
If you not see the menu bar you can access the menu via the command palette (ctrl+shift+p) and type in menu, as is explained in This answer.
Save your workspace, in the Project menu.

Answer 2

Clicking in the diff pane and pressing "esc" worked for me.