Why is the file image splitting into two sides in Photoshop?

[Fearless_Coast5F8C]

Pls. help here. I may pressed somekink shortcut key... but my file got splited on both sides.  The ruler seem weired and I can't see whole image rn.   How can I fix this issue?

[Fearless_Coast5F8C · Accepted solution]

I figures that out... Green button on top hew~ Thank you!