See README at https://gitlab.com/matsievskiysv/display-buffer-control for detailed description of package functions. Display-buffer-control (dbc) package is an interface to Emacs's powerful `display-buffer' function. It allows to specify how the buffers should be opened: should the new buffer be opened in a new frame or the current frame (Emacs frame is a window in terms of window managers) how to position a new window relative to the current one etc. dbc uses rules and ruleset to describe how the new buffers should be opened. Rulesets have a `display-buffer` action associated with them. Actions describe how the new window will be displayed (see `display-buffer` help page for details). In order to apply these actions to buffers, rules must be added. Rules specify matching conditions for the ruleset. Examples: Open Lua, Python, R, Julia and shell inferior buffers in new frames, enable `dbc-verbose` flag: (use-package dbc :custom (dbc-verbose t) :config (dbc-add-ruleset "pop-up-frame" dbc-right-side-action) (dbc-add-rule "pop-up-frame" "shell" :oldmajor "sh-mode" :newname "\\*shell\\*") (dbc-add-rule "pop-up-frame" "python" :newmajor "inferior-python-mode") (dbc-add-rule "pop-up-frame" "ess" :newmajor "inferior-ess-.+-mode") (dbc-add-rule "pop-up-frame" "lua repl" :newmajor "comint-mode" :oldmajor "lua-mode" :newname "\\*lua\\*")) Display help in right side window: (require 'dbc) (dbc-add-ruleset "rightside" '((display-buffer-in-side-window) . ((side . right) (window-width . 0.4)))) (dbc-add-rule "rightside" "help" :newname "\\*help\\*")