Posts: 22
![20](http://wspc2017.logicmastersindia.com/forum/images/decorations/multiple/25.gif) Location: United Kingdom | As mentioned, the Undo function is disabled for puzzles in Contest Mode. For trying out options, I don't like the Clone button so I either rely on my memory to know what to undo after a trial, or I switch to a different colour of line so that it's clear what's part of the trial and what is not. |