- You know that you created a document last week, but you can't remember where you put it?
- You need to copy an image from a document that you created yesterday?
- You need a paragraph, but you can't remember which document contains it and when......
For a booklover, there are plenty of book resources in internet. But it's hard for a reader reading book files on the computer: difficult to locating files; files must be opened one by one; background color cannot adjusted; reader must distinguish w......