diff --git a/images/console.png b/images/console.png
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diff --git a/images/extnsion.png b/images/extnsion.png
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diff --git a/popup/tip.html b/popup/tip.html
index 941f391..8db15e7 100644
--- a/popup/tip.html
+++ b/popup/tip.html
@@ -21,12 +21,11 @@
                 <div class="alert alert-info small">
                     <!-- <h6>Usage:</h6> -->
                     <p>
-                        <b>Open console</b> and
-                        <b>switch to Data Extracter</b>, then call the
-                        <b>extract</b> function.
+                        <b>Open console of extesion backgroud page </b> and
+                        type your scripts.
                     </p>
                     <p>
-                        <img src="demo.png" alt="" style="max-width: 489px; width: 100%; border-radius: 5px">
+                        <img src="../images/console.png" alt="" style="max-width: 489px; width: 100%; border-radius: 5px">
                     </p>
 
                 </div>
@@ -41,19 +40,21 @@
         <div class="row">
             <div class="col">
                 <div class="alert alert-success small">
-                    <p>
-                        <b>View Help</b>:
-                        <br>extract()
-                    </p>
                     <p>
                         <b>Extract current page</b>:
-                        <br>extract("list-item", ["a.title", "p.content"])
+                        <br>new Extractor().task(".list-item", ["a.title", "p.content"]).start();
                     </p>
                     <p>
                         <b>Extract multiple pages (1-10, interval 1)</b>:
-                        <br>extract("list-item", ["a.title", "p.content"], "http://sample.com/?pn=${page}", 1, 10, 1)
+                        <br>new Extractor().task(".list-item", ["a.title", "p.content"],
+                        "http://sample.com/?pn=${page}", 1, 10, 1).start();
 
                     </p>
+                    <p>
+                        <b>Full document (Right click - Open in new tab):</b>
+                        <br>
+                        <a href="https://git.jebbs.co/jebbs/data-extracter-extesion">https://git.jebbs.co/jebbs/data-extracter-extesion</a>
+                    </p>
                 </div>
             </div>
         </div>
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..19a4f50
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,138 @@
+# DataExtracter Help
+----------------------------
+
+DataExtracter helps you quickly extract data from any web pages. All you need to do is:
+
+- Find out the selectors (JQuery selectors) for target data
+- Call Extractor methods in `extension backgroud page console`, as introduced bellow.
+
+Where is the extension backgroud page console?
+
+Goto <chrome://extensions/> and click `backgroud page` link of the extension
+
+ ![](images/extnsion.png)
+
+In the opening window, find `Console`, and type your scripts.
+
+ ![](images/console.png)
+
+## Qucik Start
+
+
+
+Extract current page
+```js
+new Extractor().task(".list-item", ["a.title", "p.content"]).start();
+```
+
+Extract multiple pages (1-10, interval 1)
+
+```js
+new Extractor().task(".list-item", ["a.title", "p.content"],"http://sample.com/?pn=${page}", 1, 10, 1).start();
+```
+
+Extract multiple urls (list)
+
+```js
+new Extractor().task(".list-item", ["a.title", "p.content"],["http://sample.com/abc","http://sample.com/xyz"]).start();
+```
+
+Extract specified pages (1,3,5)
+
+```js
+new Extractor().task(".list-item", ["a.title", "p.content"], "http://sample.com/?pn=${page}", [1, 3, 5]).start();
+```
+
+## Extractor.task() Signitures:
+
+```ts
+// a task extracting data from current page
+task(itemsSelector:string, fieldSelectors:string[])
+// a task extracting data from a range of pages
+task(itemsSelector:string, fieldSelectors:string[], urlTemplate:string, from:number, to:number, interval:number)
+// a task extracting data from a list of pages
+task(itemsSelector:string, fieldSelectors:string, urlTemplate:string, pages:number[])
+// a task extracting data from a list of pages
+task(itemsSelector:string, fieldSelectors:string[], urls:string[])
+// a task extracting data of urls which extracted from last task result
+task(itemsSelector:string, fieldSelectors:string[], urls:ExractResult)
+```
+
+## Advanced Usage:
+
+### Stop tasks
+
+The only way to stop tasks before its finish, is `Closing the Tab` which runs tasks.
+
+### Extract attributes. 
+
+e.g.: link text and target (use 'selector@attribute')
+
+```js
+new Extractor().task('.list-item', ['a.title', 'a.title@href']).start();
+```
+
+### Use task chain. 
+
+e.g.: Collect links from `http://sample.com/abc` & Extract data of each link
+
+```js
+new Extractor()
+    .task('.search-list-item', ['.item a@href'], ["http://sample.com/abc"])
+    .task('list-item', ["a.title", "p.content"])
+    .start();
+```
+
+### Save result of any task
+
+To a multiple task (chain) Extractor `e`:
+
+```js
+e = new Extractor()
+e.task('.search-list-item', ['.item a@href'], ["http://sample.com/abc"])
+    .task('list-item', ["a.title", "p.content"])
+    .start();
+```
+
+User will be asked to save  the final result when it finishes.
+
+You may want to save another task's result, other than the final:
+
+```js
+// save the result of first task
+// that is, a list of urls
+e.save(1)
+```
+
+Incase you want to save it again, use:
+
+```js
+e.save()
+```
+
+### Restart tasks
+
+In cases some later task fails, you don't need to restart all task.
+
+Here we have 2 tasks:
+
+```js
+e = new Extractor()
+e.task('.search-list-item', ['.item a@href'], ["http://sample.com/abc"])
+    .task('list-item', ["a.title", "p.content"])
+    .start();
+```
+
+Suppose the second task fails, we can restart and continue from the task 2:
+
+```js
+e.restart(2);
+```
+
+If you'd like restart all task, use:
+
+```js
+e.start();
+// or
+e.restart();
+```
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