Customizing editor

The default configured editor is gvim embedded using XEmbed, but any editor or setup that support XEmbed can in principle be used.

The editor.cmd string is passed to ustring::compose, and the following arguments must be set:

filename: %1
servername: %2 (optional)
socketid: %3

Editor suggestions

gvim (default)

gvim -geom 10x10 --servername %2 --socketid %3 -f -c 'set ft=mail' '+set fileencoding=utf-8' '+set ff=unix' '+set enc=utf-8' %1

fancy gvim with Goyo and Limelight:

gvim -geom 10x10 --servername %2 --socketid %3 -f -c 'set ft=mail' '+set fileencoding=utf-8' '+set enc=utf-8' '+set ff=unix' -c Goyo -c Limelight! %1

emacs

emacs --parent-id %3 %1

neovim (through st)

st -f "Monospace" -w %3 -e nvim %1

the st terminal is used since it supports XEmbed.