You might say that everyone knows that EPiServer has this feature, but to be honest I didn't expect to find it inside the gadgets pane the first time, so I thought why not mentioning it for beginners :)
So to see the version history follow these steps:
1- In the editors page find the settings button on top right of your pane.
2- click on add gadgets
3- select "versions" gadget from the list
Version history is available for you. You can see who has done changes to the selected page and if the latest changes has been published or not :)
