In the Baseline view right-click a baseline and select Merge from Baseline.
The baseline ID is displayed in the Merge changes from this baseline box. To select a different baseline do one of the following:
Click Select and use the Select Baseline dialog box to specify a baseline.
Enter the name of a baseline in this format:
PRODUCT:BASELINE_NAME
The Merge changes into this target stream box displays the name of the stream from which you invoked the merge. To select a different target stream enter its name or click Select and choose a stream.
NOTE You can only merge into the latest version of the target stream.
Continue from Merging Changes across Streams.