split-window [-bdfhvP] [-c start-directory] [-l size | -p percentage] [-t target-pane]
[shell-command] [-F format]
(alias: splitw)
Create a new pane by splitting target-pane: -h does a horizontal split and -v a
vertical split; if neither is specified, -v is assumed. The -l and -p options
specify the size of the new pane in lines (for vertical split) or in cells (for
horizontal split), or as a percentage, respectively. The -b option causes the
new pane to be created to the left of or above target-pane. The -f option cre‐
ates a new pane spanning the full window height (with -h) or full window width
(with -v), instead of splitting the active pane. All other options have the
same meaning as for the new-window command.
因此，将以下几行放入~/.tmux.conf并采购它会导致所需的行为。注意-b选项。
# pane splitting
bind -r v split-window -bh
bind -r b split-window -bv
来自
man tmux：因此，将以下几行放入
~/.tmux.conf并采购它会导致所需的行为。注意-b选项。