My tmux conf file.

.tmux.conf

# enable scrolling into tmux panels with mouse wheel.
# https://stackoverflow.com/questions/7798103/how-to-enable-scrolling-in-tmux-panels-with-mouse-wheel
set -g mouse on

command

If you have made changes to your tmux configuration file in the ~/.tmux.conf file, it shouldn’t be necessary to start the server up again from scratch with kill-server. Instead, you can prompt the current tmux session to reload the configuration with the source-file command.

This can be done either from within tmux, by pressing Ctrl+B and then : to bring up a command prompt, and typing:

```
:source-file ~/.tmux.conf
```

Or simply from a shell:

```
$ tmux source-file ~/.tmux.conf
```