Add Open A Tag In A Split Window as a vim til

README.md

@@ -7,7 +7,7 @@ variety of languages and technologies. These are things that don't really
 warrant a full blog post. These are mostly things I learn by pairing with
 smart people at [Hashrocket](http://hashrocket.com/).
 
-_357 TILs and counting..._
+_358 TILs and counting..._
 
 ---
 
@@ -393,6 +393,7 @@ _357 TILs and counting..._
 - [Navigating By Blank Lines](vim/navigating-by-blank-lines.md)
 - [NETRW Listing Styles](vim/netrw-listing-styles.md)
 - [Next Modified Buffer](vim/next-modified-buffer.md)
+- [Open A Tag In A Split Window](vim/open-a-tag-in-a-split-window.md)
 - [Open an Unnamed Buffer](vim/open-an-unnamed-buffer.md)
 - [Open Routes File With vim-rails](vim/open-routes-file-with-vim-rails.md)
 - [Opening a URL](vim/opening-a-url.md)

vim/open-a-tag-in-a-split-window.md

@@ -0,0 +1,15 @@
+# Open A Tag In A Split Window
+
+Using tags and `ctrl-]` is a quick way to jump from the use of a keyword to
+the declaration or definition whether in the same file or another file.
+Sometimes what you really want is that tag definition opened up in a
+(horizontal) split window. That way you can see the definition without
+losing context. This can be accomplished with `ctrl-w ]`.
+
+As the Vim help file states:
+
+> Use identifier under cursor as a tag and jump to it in the new upper window.
+
+See `:h CTRL-W_]` for more details.
+
+h/t Dorian Karter