The default prefix in tmux is <code>ctrl+b</code> . 
Let’s accept it. Using <code>ctrl+b</code> time and again is a pain in your wrist. It’s time to solve this issue.
<ol>
<li>Make your caps lock key to act as <code>ctrl</code> key.
 Go to <code>System Preferences &gt; Keyboard</code> . Under the <code>Keyboard</code> tab click on <code>Modifier Keys...</code> button at the bottom right.
 Map the <code>Caps Lock Key</code> to <code>^Control</code>
 Click <code>OK</code>
</li>
<li>Open <code>~/.tmux.conf</code> in your default text editor and add these:
<pre><code class="lang-txt"> # Send prefix
 unbind-key C-b
 set-option -g prefix C-Space
 bind-key C-Space send-prefix
</code></pre>
 The above command sets the default prefix to <code>ctrl+space</code> .
</li>
</ol>

The default prefix in tmux is `ctrl+b` . 

Let’s accept it. Using `ctrl+b` time and again is a pain in your wrist. It’s time to solve this issue.

 

1. Make your **caps lock** key to act as `ctrl` key.
    
    Go to `System Preferences > Keyboard` . Under the `Keyboard` tab click on `Modifier Keys...` button at the bottom right.
    
    Map the `Caps Lock Key` to `^Control`
    
    Click `OK`
    
2. Open `~/.tmux.conf` in your default text editor and add these:
    
    ```txt
    # Send prefix
    unbind-key C-b
    set-option -g prefix C-Space
    bind-key C-Space send-prefix
    ```
    
    The above command sets the default prefix to `ctrl+space` .

Shailesh Kumar Sundram

Shailesh Kumar Sundram

How to Change tmux Prefix to Ctrl+Space on macOS