Un-Undoing - Finder

drag Firefox from your applications folder onto the left side of the Dock and drag your Documents folder onto the right side of the dock.

 

im not sure what you mean by this? usually the 'poof' effect only happens when you remove something from the dock. applications & stacks are only aliases so you can just drag them back if you remove them by accident.

 

That folder is still on your harddrive somewhere... you just deleted the shortcut in the dock...
Check your home folder or use spotlight with some names of your files...

 

Did you try pressing Command-Z again? Sometimes this acts as a 'redo' action in the Finder.

 

I think you didn't actually copy the files, I think you just added references to them on the network to your Dock. You have to be careful about how you drag files to folders on the dock. If the folder isn't darkened and doesn't have its name showing, you're just adding aliases to the files in the dock: that's why they appeared there.

 

I had the same problem today, nearly 10 years later; since this post shows up as the first answer on Google, I am posting the simple solution here, found at this link:
https://support.apple.com/en-us/HT201236
You can then press Command-Shift-Z to Redo, reversing the undo command.

That restored my files to the Finder folder!

 

Any icon u remove from the dock would just vanish in a puff of smoke... Just drag them back from the folder. When u drag to he dock, it crates an alais.. all that happens is when u vanish it, it just removes that alias, but the original file is still there

 

This thread is nine years old. And clearly the OP was not talking about 'undoing' removing something from the dock.

 

If this thread was nine years old in 2015, it is now - eleven years old - ! It is still relevant though and I feel for the OP, few seemed to understand what he was talking about.

I too am 'a victim' of this phenomenon. I copied a bunch of files from a flash drive to my MPB. I then accidentally removed the 'Documents folder' when i tried to backup the newly copied files to our work NAS. By force of habit i hit cmd+z. That of course didn't restore the folder shortcut I just removed, but sent my recently copied files in to a cloud of smoke. There is no option to further undo or redo. The files are just gone. And I am certain they were copied to my drive since I looked at them in Photoshop after copying from the USB drive.

Is there any way of prohibiting this or get the files back without copying from the original source again?

 

Time Machine may have had a chance to backup the files before you deleted them.

 

Do you live in the future? Is Trump still president?