diff --git a/doc/lightline.txt b/doc/lightline.txt
index a2588c2..0b41c12 100644
--- a/doc/lightline.txt
+++ b/doc/lightline.txt
@@ -4,7 +4,7 @@ Version: 0.1
 Author: itchyny (https://github.com/itchyny)
 License: MIT License
 Repository: https://github.com/itchyny/lightline.vim
-Last Change: 2017/05/28 00:40:46.
+Last Change: 2017/05/28 01:07:02.
 
 CONTENTS					*lightline-contents*
 
@@ -54,17 +54,15 @@ SPIRIT						*lightline-spirit*
 OPTIONS						*lightline-option*
 
 	g:lightline				*g:lightline*
-		All the options are stored into this global variable.
+		All the configurations are stored in this global variable.
 
 	g:lightline.active			*g:lightline.active*
 	g:lightline.inactive			*g:lightline.inactive*
 	g:lightline.tabline			*g:lightline.tabline*
-		Dictionaries to specify the statusline/tabline components.
-		The components are gathered from either |g:lightline.component|,
-		|g:lightline.component_function| or
-		|g:lightline.component_expand|.
+		Dictionaries to store the statusline/tabline components.
 		Note that right groups of components are stored from right to
-		left. The default values are:
+		left.
+		The default values are:
 >
 		let g:lightline.active = {
 		    \ 'left': [ [ 'mode', 'paste' ],
@@ -81,10 +79,7 @@ OPTIONS						*lightline-option*
 		    \ 'right': [ [ 'close' ] ] }
 <
 	g:lightline.tab				*g:lightline.tab*
-		Dictionaries to specify the components in each tabs.
-		The components are gathered from either
-		|g:lightline.tab_component| or
-		|g:lightline.tab_component_function|.
+		A dictionary to store the tab components in each tabs.
 		The default values are:
 >
 		let g:lightline.tab = {
@@ -92,7 +87,7 @@ OPTIONS						*lightline-option*
 		    \ 'inactive': [ 'tabnum', 'filename', 'modified' ] }
 <
 	g:lightline.component			*g:lightline.component*
-		Dictionary for statusline/tabline components.
+		A dictionary for statusline/tabline components.
 		The default value is:
 >
 		let g:lightline.component = {
@@ -119,11 +114,11 @@ OPTIONS						*lightline-option*
 <
 	g:lightline.component_visible_condition
 						*g:lightline.component_visible_condition*
-		Dictionary to store the visible condition of the components.
-		Each expression should correspond to the condition each
-		component is not empty. This configuration is used to control
-		the visibility of the subseparators. You cannot use this
-		configuration to control the visibility of the components.
+		A dictionary to store the visible condition of the components.
+		Note that this configuration is used to control the visibility
+		of the subseparators, not to control the visibility of the
+		components themselves. Each expression should correspond to
+		the condition on which each component is not empty.
 		The default value is:
 >
 		let g:lightline.component_visible_condition = {
@@ -132,14 +127,11 @@ OPTIONS						*lightline-option*
 		    \ 'paste': '&paste',
 		    \ 'spell': '&spell' }
 <
-		Users are recommended to set this option together with the
-		component itself.
-
 	g:lightline.component_function		*g:lightline.component_function*
-		User can register component functions in this dictionary.
+		A dictionary to store the function components.
 		This is useful to write a complex component configuration and
-		to integrate with other plugins. If a component set to both
-		component and component_function, the setting of
+		to integrate with other plugins. If a component set in both
+		component and component_function, the configuration of
 		component_function has priority.
 
 		The default value is:
@@ -147,7 +139,7 @@ OPTIONS						*lightline-option*
 		let g:lightline.component_function = {}
 <
 		For example, if you want to display the name of the git branch,
-		install vim-fugitive plugin and then configure as:
+		install |vim-fugitive| plugin and then configure as:
 >
 		let g:lightline = {
 			\ 'active': {
@@ -161,21 +153,21 @@ OPTIONS						*lightline-option*
 <
 	g:lightline.component_function_visible_condition
 						*g:lightline.component_function_visible_condition*
-		Dictionary to store the visible conditions of the function
+		A dictionary to store the visible conditions of the function
 		components. Each expression should correspond to the condition
 		each component is not empty. This configuration is used to
 		control the visibility of the subseparators. You can use this
 		configuration to reduce the number of function calls for
-		function components by setting the value 1 (to tell lightline
+		performance improvement by setting the value 1 (to tell lightline
 		that the component is always visible).
 		The default value is:
 >
 		let g:lightline.component_function_visible_condition = {}
 <
 	g:lightline.component_expand		*g:lightline.component_expand*
-		Another dictionary for components. You can create a component
-		which has a special color. For example, error components or
-		warning components. The functions should return one of:
+		A dictionary to store expanding components. You can create
+		warning and critical components. The values should be the name
+		of functions should return either one of:
 			+ a string
 			+ an array of three elements:
 				[[ left ], [ middle ], [ right ]]
@@ -282,7 +274,6 @@ OPTIONS						*lightline-option*
 		    \ 'tabline': 1
 		    \ }
 <
-
 ==============================================================================
 FONT						*lightline-font*
 You can use the patched font you used for |vim-powerline| and |powerline|.