Project management controls design versions and revisions. A version represents an input design netlist. Each time a change is made to the source design, such as logic being added to or removed from the schematic or the HDL source being modified, a new version is created. A revision represents an implementation on a given version, usually with new implementation options, such as different placement or router effort level.
Foundation maintains revision control, meaning that the resulting files from each implementation revision are archived in the project directory.
The source design for each version is not archived, only the resulting netlists and files for each revision are archived. Therefore, if you wish to save iterations of the source design (schematic or HDL files, for example), you should use the archive wizard to create backup copies of the project or back up individual files on your own.
Foundation manages and displays your design versions and revisions graphically in the Versions tab of the Project Manager. Since you have not yet implemented the design, the Versions tab is currently empty.
