In #tmux, a "horizontal split" pane window places the panes side-by-side via "Ctrl+b %" or ":split-window -h".

In #Vim, it's a "vertical split" by executing either "Ctrl+w Ctrl+v" or ":vsplit".

No wonder I'm always confused.

Is it a horizontal split because the windows/panes or horizontally placed, or a vertical split because there is a vertical line separating the windows/panes?

#Linux

@atoponce I solved this by keeping `:sp` and `:vsp` which make sense to me in #vim and by using `<prefix>-` and `<prefix>|` in #tmux. `-` and `|` are visually explicit. See my config if it helps : https://gitlab.com/pcoves/tmux/-/blob/master/tmux.conf?ref_type=heads#L11-12
tmux.conf · master · Pablo COVES / tmux · GitLab

Yet another tmux configuration

GitLab