Re-use buffers across visible frames
By default, popwin pops up a window in the current frame only. This is fine, but if I have a multi-monitor setup, I want the secondary monitor to have these secondary buffers (e.g. test or grep output, magit).
display-buffer-alist, I can activate popwin only when the
buffer isn’t already there. I hope this doesn’t break other stuff!
(setq display-buffer-alist '((popwin:display-buffer-condition (display-buffer-reuse-window popwin:display-buffer-action) (reusable-frames . visible))))