| Trimming Revisions | |
When you make any change to a dataset, Windographer will record a revision that you can see in the Dataset History window. For several types of revisions, Windographer will store within the revision an archived data frame representing the state of the dataset before the revision. If you undo that revision, Windographer removes that revision and restores its archived data frame.
To trim a revision means to delete the archived data frame it contains. Trimming a revision reduces the amount of memory required to store the dataset, and therefore the size of its windog file, but it also eliminates the possibility of undoing that revision.
Some types of revisions do not require this archived data frame, and any revision made with a version of Windographer older than version 5 will not contain the archived data frame. That means some revisions are trimmable and some are not.
In the Options window you can specify the maximum amount of memory Windographer will allocate to stored revisions in RAM and in windog files. Whenever you make a change to a dataset and thereby add a new revision, Windographer will check the RAM undo storage limit and trim as many old revisions as required to stay within that limit. Similarly, whenever you save a windog file, Windographer will check the file-related undo storage limit and trim as many old revisions as required to stay within that limit.
Buttons on the Dataset History window allow you to trim specific revisions, or all revisions within a dataset:
See also