Add Reset An Option Back To Its Default Value as a tmux til

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://tinyletter.com/jbranchaud).
 
-_983 TILs and counting..._
+_984 TILs and counting..._
 
 ---
 
@@ -883,6 +883,7 @@ _983 TILs and counting..._
 - [Pane Killer](tmux/pane-killer.md)
 - [Reclaiming The Entire Window](tmux/reclaiming-the-entire-window.md)
 - [Rename The Current Session](tmux/rename-the-current-session.md)
+- [Reset An Option Back To Its Default Value](tmux/reset-an-option-back-to-its-default-value.md)
 - [Show The Current Value For An Option](tmux/show-the-current-value-for-an-option.md)
 - [Swap Split Panes](tmux/swap-split-panes.md)
 - [Switch To A Specific Session And Window](tmux/switch-to-a-specific-session-and-window.md)

tmux/reset-an-option-back-to-its-default-value.md

@@ -0,0 +1,32 @@
+# Reset An Option Back To Its Default Value
+
+Once you start changing the values of options, tmux can be opaque about what
+the original default values were.
+
+For instance, if you change the `escape-time` option with the following
+command:
+
+```bash
+$ tmux set-option -g escape-time 0
+```
+
+It's now set to `0`, so without digging through the tmux man pages, how do you
+figure out what the default was and restore it?
+
+The `set-option` command takes the `-u` flag to _unset_ the option. This will
+restore it to the default.
+
+```bash
+$ tmux set-option -u escape-time
+```
+
+And you can now see the original default value with `show-option`.
+
+```bash
+$ tmux show-option escape-time
+500
+```
+
+Use `set-option -u` with any option to restore it to its default.
+
+Find `set-option` in `man tmux` for more details.