I installed Solaris 11.4 with the text installer image. Maybe I missed the moment when it asked me about the installed software, but now I have 13GB installed for large-server. Instead I want to reduce all the software to the package group minimal-server, but haven't find any way to do so.
https://docs.oracle.com/cd/E37838_01/html/E60979/gnzqk.html shows how to use the command pkg exact-install to do this.