Story
If I work on a set of items in a workspace, I can undo my last commands. If I undo them, I can also redo them if I decided that they were actually working fine for me.
If I'm unsure which command would be undone or redone or on what items it would be applied, I can use a undo/redo function to show me the name of the command and to highlight all items in the current view, which it would run on.
Description of desired behavior
Please consult the usage summary for a full definition of mouse, touch and keyboard usage definitions.
Global undo/redo
As is the case with the clipboard, undo/redo belongs to the global functions. It uses a command history to record which commands were executed on what items and the arguments that were used.
A typical scenario looks like this: you add an image in asset management, then switch to your website and add a page you intend to use the image on, but then realize while filling in content that you actually won't need either. Right from where you are, you hit undo e.g. three times to remove the paragraph, then the page, then the image you've added.
The undo/redo function has a similar character as the clipboard.
Since the command history not only contains the command that was executed, but also records the item or items it was executed on, it is always clear what has to be undone or redone. You may thus use undo (or redo) even if you're in a different workspace now than you were when you executed the command you intend to undo. A confirmation message is displayed if the operation was undone or redone successfully, else an error message is displayed.
Note that the undo/redo function need not be present in a particular workspace, but every action you take in any workspace is added to the command history and thus may be undone and redone at will.
Preview of undo/redo operation
If a user clicks/taps and holds the undo or redo function, a tooltip will name the type of function as well as the name of the command to be undone or redone, e.g. "Undo: delete image" or "Redo: paste 4 items" (the tooltip may actually already show on mouse hover). It will also highlight all items in the current view affected by the operation, if possible. This effect disappears again if the mouse button is released or the tap ends. Note that releasing the mouse button or ending the tap does not cause the undo or redo to be executed in this case - you have to click/tap the button again to get this behavior.
Mockups
