Problem Description

Before making some changes onto your design file, you might need to set a Mark at particular point in time, in order to undo the changes back to that point, later on.

Sometimes after setting the Mark, the icon "Undo To Mark" does not appear.

Steps to Resolve

To make it reappear , toggle the "To Mark"   setting as per image

Alternatively, use the key-in: Undo Mark

See Also

Set a bookmark in MicroStation V8i

Other Language sources

French