fix tmux copy mapping

home/user/.config/tmux/mappings.conf

@@ -183,8 +183,10 @@ bind -n M-Tab swap-pane -t '{left-of}'
 setw -g mode-keys vi
 bind v copy-mode
 bind C-p choose-buffer
-bind -T copy-mode-vi C-v send-keys -X rectangle-toggle
-
+bind -T copy-mode-vi C-v {
+    send-keys -X rectangle-toggle
+    if -F '#{selection_active}' '' 'send-keys -X begin-selection'
+}
 
 bind -T copy-mode-vi y send-keys -X copy-pipe-and-cancel "copy"