A merging operation is performed in one direction; you apply the changes from one stream to another. However, you may need to merge changes in both directions and synchronize the two streams. You can use the following methods to synchronize streams:
Merge in one direction and then click Swap in the Merge wizard to merge in the opposite direction. The target in the first merge becomes the source in the second merge. You will need also to change the work area to match the target stream for the second merge.
Sometimes it may be faster to branch a new stream instead of merging a very large number of files. First merge the stream containing fewer changes into the other stream. Then create a new stream based on the target of the previous merge operation. The result is two identical streams from a single merge operation.