I'm a big of SourceTree and use it all the time. One sticking point for me is that when I merge or rebase and encounter conflicts, I wind up opening the files in a text editor and manually editing them, looking for the <<<<< and >>>>> bits and hoping I got everything.
Is it possible in SourceTree to right-click a conflicted file and open a merge tool, or take an equivalent step? And can I set my choice of merge tool in the SourceTree interface in some way?