How to combine change sets into a single change set?

Hi Isabelle,
Not sure how much helps you, but found jazz.net work item regarding this functionality: https://jazz.net/jazz/web/projects/Rational%20Team%20Concert#action=com.ibm.team.workitem.viewWorkItem&id=16507.
anyway there is no update there since 2008. Feel free to add comment then to gain attention there.

I don't think there's any similar function built into the product, but I can tell you the trick I use in my own day to day development. I don't know if the RTC SCM team would sanction this, but it works for me...

1. Disconnect the projects that your changes are in.
2. Discard your change sets. (This won't affect the files on your local filesystem if the projects are disconnected.)
3. Reshare your projects. At this point, SCM will compare your contents on disk with the contents on the server and you'll have a new set of changes to commit.

Hope that helps.

A feature was added for release 6.0.6.1 that allows a user to combine two or more change sets into a single change set.

In the Eclipse client:
https://www.ibm.com/support/knowledgecenter/SSYMRC_7.0.0/com.ibm.team.concert.dotnet.doc/topics/t_combining_change_sets.html

In the Visual Studio client:
https://www.ibm.com/support/knowledgecenter/SSYMRC_7.0.0/com.ibm.team.concert.dotnet.doc/topics/t_combining_change_sets.html

In the Command Line Interface:
https://www.ibm.com/support/knowledgecenter/SSYMRC_7.0.0/com.ibm.team.scm.doc/topics/combine_changesets.html