modified readme.md

readme.md

@@ -12,13 +12,38 @@ PaperHub is a command line tool to search papers using [dblp](https://dblp.org/)
 
 ## Installation
 
+python=3.7+
+
 ```
 pip install -r requirements.txt
 ```
 
-### Usage
+## Settings
 
-```
+There are few settings for you in `settings.json` 
+
+- `publishers`: a pre-defined list of publishers to specify when you choose ‘search by publishers’.
+
+- `number_per_search`: number of papers to show for each search.
+
+- `number_per_publisher`: max number of papers for each publisher.
+
+- `style`: how to show searching result. Can be `default` or `rainbow`(colorful entries).
+
+- `line_height`: line height in `px`.
+
+- `rainbow_color`: color of components of entries in hex. 
+
+  > You may find some pretty color scheme [here](http://brandcolors.net/).
+
+## Usage
 
 ```
+python dblpSearch.py
+```
+
+Then input keywords to search & choose whether to use pre-defined list of publisher.
+
+## Demo
 
+![image-20210910221059893](readme.assets/image-20210910221059893.png)