Hello, AlexRK, you wrote: N>> And as a result you will dig in a heap of heterogeneous editings that it is necessary to save and that is not present, in what variant works and why... Also you will kill on it even three hours. ARK> all five times it was simple Ctrl+Z for some seconds. You IDE allows the general history on some different files which can be rolled away through Ctrl+Z? If yes - name it. If is not present - excuse, operation when only one file always changes, is level of a children's sandbox, in comparison with for what generally are developed SCM type systems git.>> personally to time it is a pity To me on nonsense, - business of pair seconds. ARK> for a week from these two seconds runs two hours. Yes. And on them it is necessary to distract not only because it is a rollback point - but also because realization made is necessary for advance. N>> that in an hour you something will get change so that you will understand that all is delirium, and you will want to be rolled away to the fixed state. . And it is not present, because you solved only in two hours. ARK> well, time five for all life at me such can and was. But generally it is awfully rare case. Fairly I envy such simplicity. Any suits such tasks SCM, though ancient RCS, though clumsy SourceSafe, though generally button F5 on an archive disk.