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More on Summit/CM Version Control (Apex/Summit)Placing a file under version control tracks the file's development by saving a version of the file every time it is checked in. Each version is a snapshot of the file's contents at a given time.
Checking out a file begins the process of making a new version of the file. You can modify a controlled file only while it is checked out.
When you check in the file, the new version is completed and the file becomes read-only.
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Creating multiple versions of a file produces a time-ordered, numbered sequence of versions called a version history (or just history). You can visit any version in a history (use Control > Show > Versions (Apex/Summit)), but you cannot modify a version.
Although you cannot modify a version, you can use the contents of any version as the basis for creating a new version.
Version control is described in detail in the Summit User's Guide.
Additional Topics
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