When doing a Ctrl+left mouse button in a buffer, I get the Emacs buffer-menu. When lots of buffers are open, Emacs will arrange them according to buffer mode. I.e. I will have a sub-menu for C++, for Java, etc. If too few buffers are open, this is not the case. Can I tweak this behaviour to always get the subcategories?
You should customize the value of
From the documentation: