Provide the ability to undo an answer

[askingalot]

Give the user the ability to undo an answer if they mistakenly place an incorrect answer choice on an answer placeholder.

[gvwilson]

👍 This means we should highlight placed labels somehow - if there's lots of text on the diagram, users may lose track of which labels they placed and which are static.

[askingalot]

So something like a border and/or color. That's a good idea.

I'm still not sure what the best mechanic should be for undoing though. Should there be an 'undo' button? Should the user be able to drag the label away? Should the user be able to replace an answer with a new answer?

[gvwilson]

Drag away, or double-click to yank it back to the list of unassigned labels?