opam-switch-mode
IDE extension for Proof General to locally change or reset the opam switch from a menu or using a command.
OCaml › Developer Tools: “Minor mode for Emacs that extends Tuareg and Merlin with menus to change or reset the opam switch in the ambient Emacs session.”
Coq › Projects > User Interfaces: “IDE extension for Proof General to locally change or reset the opam switch from a menu or using a command.”