diff --git a/.gitmodules b/.gitmodules
index bd56b42..7fc8846 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -97,3 +97,6 @@
 [submodule "vim/bundle.pager/vim-markdown-concealed"]
 	path = vim/bundle.pager/vim-markdown-concealed
 	url = https://github.com/prurigro/vim-markdown-concealed
+[submodule "vim/bundle/ttagecho_vim"]
+	path = vim/bundle/ttagecho_vim
+	url = https://github.com/tomtom/ttagecho_vim.git
diff --git a/vim/bundle/ttagecho_vim b/vim/bundle/ttagecho_vim
new file mode 160000
index 0000000..73cc43e
--- /dev/null
+++ b/vim/bundle/ttagecho_vim
@@ -0,0 +1 @@
+Subproject commit 73cc43e1f973dbd57244d3ddcb5f9130e32ba4db
diff --git a/vim/config/keyboard.vim b/vim/config/keyboard.vim
index 2d14003..5454f09 100644
--- a/vim/config/keyboard.vim
+++ b/vim/config/keyboard.vim
@@ -74,6 +74,7 @@
 "
 "  (toggles and features)
 "    `                        | (N) -> popup a command reference
+"    ,                        | (N) -> display tag information in echo area
 "    <Leader><F1>             | (N) -> toggle the vim reference manual
 "    <Leader>?                | (N) -> toggle the vim reference manual
 "    ~                        | (A) -> toggle the gutter(line numbers, folds and signify)
@@ -224,8 +225,8 @@
 "
 " Filetype Specific Mappings:
 "  (extradite)
-"    <C-F4>                   | (A) -> close the dialog
-"    <A-F4>                   | (A) -> close the dialog
+"    <Ctrl-F4>                | (A) -> close the dialog
+"    <Alt-F4>                 | (A) -> close the dialog
 "    <Right>                  | (A) -> same as down
 "    l                        | (A) -> same as j
 "    <Left>                   | (A) -> same as Up
@@ -247,7 +248,8 @@
 "    ?<                       | (A) -> close the dialog
 "
 "  (markdown)
-"    <F8>                     | (A) -> show heading TOC instead of the taglist
+"    <Ctrl-F3>                | (A) -> show heading TOC instead of the taglist
+"    <Alt-F3>                 | (A) -> show heading TOC instead of the taglist
 "
 "  (markdown toc)
 "    <LClick>                 | (A) -> left click + left justify the cursor
@@ -392,6 +394,9 @@
         "toggle the command reference box
         nnoremap <silent><expr> ` ':TCommand<CR>'
 
+        "display tag information in the gutter
+        noremap <buffer> <silent><expr> , ':TTagechoWord<CR>'
+
         "toggle the vim reference manual
         nnoremap <silent><expr> <Leader><F1> ':h index.txt<CR>'
         nnoremap <silent><expr> <Leader>? ':h index.txt<CR>'