To add more detail: You can split a window into multiple subwindows, and each subwindow can show any file. If you want, you can watch different parts of the sa

To add more detail: You can split a window into multiple subwindows, and each subwindow can show any file. If you want, you can watch different parts of the same file in different subwindows (each subwindow can be scrolled independently). This is something that emacs does better and more flexibly than many supposedly advanced editors and IDEs. For historical reasons emacs uses its own terminology: a window is called a "frame", and what I called subwindow above is called a "window". Instead of a file, in emacs you talk about "buffers", although a buffer is not exactly the same thing as a file, since you can (and do) have buffers that are interfaces to other emacs functionality, not linked to any particular file.