This is not currently possible. Once an incident is escalated it cannot be un-escalated.
This is something we will probably have to address in a future version. In your escalation process do you allow your users to skip escalation levels? If skipping levels is allowed, it should probably allow clearing the escalation level as well. If skipping is not allowed, however, we also do not allow users to go down in levels, it can only go up, so how would you see unescalation being handled? Perhaps it should have an Admin override like the workflow steps do. Any thoughts?
Dan Suceava
http://www.axosoft.com