diff --git a/README.md b/README.md
index 3e242cd..62ac62f 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ https://github.com/YujiSODE/txtStat
 ______
 
 Function`txtStat(FLG95)`loads text data and make a graph of frequency against the Unicode codepoints,
-and returns function that returns character analysis result.
+and returns function that returns [character analysis result](#character-analysis-result).
 
 ## Script
 * `txtStat.js`
@@ -16,7 +16,7 @@ and returns function that returns character analysis result.
 ## How to use
 1. To activate interface:`var y=txtStat();`  
 2. To get character analysis result:`y();`  
-   An object is returned as a result.
+   An [object](#character-analysis-result) is returned as a result.
 
 ## Interface
 1. __Textarea:__ a text input for analysis.  
@@ -26,7 +26,7 @@ and returns function that returns character analysis result.
 3. __Load__ button; it loads text data in "__Textarea__" as a set of data.  
    
 4. __Analyze__ button; it analyzes all loaded text datasets and make a graph of frequency against the Unicode  
-   codepoints on canvas tag. _Optionally another canvas tag is also available to output_.  
+   codepoints on canvas tag. [_Optionally another canvas tag is also available to output_](#optional-settings).  
    
 5. __Clear textarea__ button; it clears only "__Textarea__".  
    
@@ -35,7 +35,7 @@ and returns function that returns character analysis result.
 7. __Close__ button; it closes this interface.
 
 ## Character analysis result
-This is an object returned by a function, which returned by function`txtStat()`.  
+This is an object returned by a function, which is returned by function`txtStat(FLG95)`.  
 This object has 9 values  
 1. `data`: JSON formatted loaded data with a value`N`indicating a cumulative frequency of text datasets.  
    
@@ -51,7 +51,7 @@ This object has 9 values
 4. `log`: a timestamp.  
    
 5. `xMax`: the max Unicode codepoint value in loaded text datasets.  
-   This is an object with 4 values\(`x`,`x16`,`char`, and`xMaxFreq`; see`xMin`\).  
+   This is an object with 4 values\(`x`,`x16`,`char`, and`xMaxFreq`; _see 6_\.`xMin`\).  
    
 6. `xMin`: the min Unicode codepoint value in loaded text datasets.  
    `xMax`and`xMin` are objects with 4 values.
@@ -68,9 +68,11 @@ This object has 9 values
 
 ## Optional settings
 * __Setting of function`txtStat(FLG95)`__  
-  `FLG95`: [optional] true | false; 95% of canvas width is shown when `FLG95`= true  
+  `FLG95`: true | false; 95% of canvas width is shown when `FLG95`= true  
   
 * __Setting of another canvas tag to output__  
+  A valid id of another canvas tag can be input when __Analyze__ button is clicked.  
+  [Character analysis result](#character-analysis-result) is overwritten by result of another canvas tag when input id is valid.  
   
-* __Setting of change canvas width__  
-  
+* __Setting of canvas width__  
+  Width of another canvas tag can be changed when input id is valid.