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To revert all the changes made in the context of an activity, in the context menu of the specific activity choose Undo Checkout.
This unchecks out the activity and reverts all the changes made in the context of the activity.
To revert all the changes done to the specific resource, in its context menu choose Undo checkout.
This reverts the changes made in this resource.
When a resource is reverted, the latest revision of the resource in the repository is copied on to the client workspace and the resource is no longer open for edit.
All changes are discarded.