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Difference Viewer 
You use this tool to view differences between two versions of a code object. You can use the default difference viewer provided by Mobile Application Studio (MAS) or a third-party difference viewer.
· It can be opened from the:
¡ Version Tree, where you can view differences between any two versions of a code object
¡ Change List Browser, where you can view differences between any change list version and the baseline version of the code object
¡ Collision Viewer, where you can view differences between two colliding versions of a code object
· It displays code existing for the two versions in a grid format.
· It highlights the differences between versions in yellow. If the difference between versions is omission in one of the objects, the highlight is gray.
The third-party difference viewer must be capable of displaying differences in text format.
See also:
Viewing Difference Between Versions
Viewing Differences Between Colliding Versions