iPhoto - Undo Events Merge

[Cogmate]

New to iPhoto.
By dragging & dropping, I merged 5 individual Events into one Event.
Don't like it.
Would like to Undo, and get my 5 individual Events back.
Can this be done? How?

 

[Weaselboy]

Hit command-z to undo the merge.

 

[Cogmate]

Hit command-z to undo the merge.

Worked nicely. Thanks a lot.