Why does tmux erase terminal contents on editor exit?

Question

Say I'm running tmux and use "ls" to get something on the screen. Then I enter Vim to edit some file. After exiting Vim, tmux erases whatever text is above the bash prompt (not like the clear command since the prompt stays in the same place).

Is there a way to prevent this behavior? I'm using tmux 1.3 in Terminal.app on OS X.

Answer 1

If your version of tmux has this option, add this line to your ~/.tmux.conf:

set-window-option -g alternate-screen on