project history
History allows you to view and manipulate your project history. The project file contains a log of all Commit operations and you can change the current state of the ROM image to an arbitrary commit.
Any time you use the Commit to ROM button on an editing dialog, a
new entry will be created in the commit log representing the state of the
ROM at the time of the commit (i.e. immediately after the commit).
Manual Commit allows you to create a commit from the current state of
the ROM. Some dialogs (e.g. Miscellaneous Hacks) do not have a
Commit operation. If you want to create a Commit for such an operation,
you can create it manually.
Make Selection Current makes the currently selected commit the current
state of the ROM image. If there are uncommited changes in the current
ROM image, they will be lost.
Delete Selection deletes a commit from the commit history.
The Description field is the description for a given commit. You can change
the text to whatever you like.
The project file (.z2prj) represents the entire history of your project.
In order to create a ROM file that can be played on an emulator or edited
by another tool, use Export ROM to save a .nes file.
If you have edited a ROM in another tool and want to import that ROM into
your project, use Import ROM. Importing a ROM will create a commit in
the history of the state of the ROM image immediately before the commit.