That still isn't very easy to understand, and certainly isn't specific enough to be clear.
But anyway;
1. If you are working on a MC Client, changes to views are not permanent, and will revert to the original view as defined on the MC Server. Although the changes should remain until you close the MC Client, in my experience.
2. Some views are locked, and so can't be changed unless you unlock them, or save them to a new name after changes. You can still overwrite a locked view I think, but it is not recommended. If you do edit a locked view, and try to save the changes, you will get a warning and options available.
Does that help at all?