diff --git a/.tmux.conf b/.tmux.conf
index a6fb388..4e099db 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -1,10 +1,11 @@
 ## pcht tmux configurarion
 # (c) 2018
 
-# change prefix to ctrl+a
+# change prefix to ctrl+a and 
+# use "C-a a"to send C-a to shell
 unbind C-b
 set -g prefix C-a
-bind C-a send-prefix
+bind a send-prefix
 
 # disable login-shell on tmux
 # https://wiki.archlinux.org/index.php/Tmux#Start_a_non-login_shell
@@ -13,7 +14,9 @@ set -g default-command "${SHELL}"
 # open pane/window in same directory
 # https://unix.stackexchange.com/questions/12032/create-new-window-with-current-directory-in-tmux
 bind '"' split-window -c "#{pane_current_path}"
+bind s split-window -c "#{pane_current_path}"
 bind % split-window -h -c "#{pane_current_path}"
+bind '|' split-window -h -c "#{pane_current_path}"
 bind c new-window -c "#{pane_current_path}"
 
 # last pane like in screen