Add Change The Default Prefix Key as a tmux til

README.md

@@ -9,7 +9,7 @@ and pairing with smart people at Hashrocket.
 
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-_976 TILs and counting..._
+_977 TILs and counting..._
 
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@@ -861,6 +861,7 @@ _976 TILs and counting..._
 - [Adjusting Window Pane Size](tmux/adjusting-window-pane-size.md)
 - [Break Current Pane Out To Separate Window](tmux/break-current-pane-out-to-separate-window.md)
 - [Change Base Directory Of Existing Session](tmux/change-base-directory-of-existing-session.md)
+- [Change The Default Prefix Key](tmux/change-the-default-prefix-key.md)
 - [Create A Named tmux Session](tmux/create-a-named-tmux-session.md)
 - [Create A New Session In A New Server](tmux/create-a-new-session-in-a-new-server.md)
 - [Cycle Through Layouts](tmux/cycle-through-layouts.md)

tmux/change-the-default-prefix-key.md

@@ -0,0 +1,25 @@
+# Change The Default Prefix Key
+
+The _prefix_ key for tmux is a key that tells an active tmux session that the
+following key should be interpreted as a tmux command instead of regular input
+to the terminal.
+
+By default, tmux has `Ctrl-b` bound to the prefix.
+
+So, hitting `Ctrl-b` followed by `?` will open up the tmux help.
+
+Typing `Ctrl-b` involves a bit of a finger stretch. It can be changed to
+something more comfortable. My personal preference is `Ctrl-z`. Many
+configurations I've seen use `Ctrl-a`.
+
+To change this, open up your `~/.tmux.conf` file and add two lines.
+
+```
+unbind C-b
+set -g prefix C-z
+```
+
+And then run `:source-file ~/.tmux.conf`.
+
+This tells tmux to unbind `Ctrl-b` so that it no longer is interpreted as the
+prefix, and then it binds `Ctrl-z` as the new prefix key.