Why isn't the undo button working?

[[Ma...]]

When I click "edit > undo " after editing or deleting a feature or characteristic, the action is not reversed. Does the undo button only work for specific actions? I also tried pressing CTRL + Z but that also doesn't reverse the action.

[[To...]]

There is no Un-do in Calypso. If you click on the screen and add a point somewhere, that button will delete that point.

If you delete a feature or characteristic by mistake, click on the trash can icon and that will open a window of everything you've deleted in the current session of Calypso. You can click on an item and drag it back into the features list or characteristics list.

That's about it.