Help for BSON Books Viewer

To use the BSON Books Viewer, the first step is to download ebook files. The Viewer employs a specific method of download called "import" that directly saves the ebook contents into a database located on your computers or mobile devices. The Viewer can then display ebook contents from the local database and let you bookmark, highlight, annotate and search even without internet connection.

Download eBook Files

  1. For Style s (recommended for smartphones and small tablets), click on Menu at the top left to bring up a menu. In the menu, click on Portal to visit a portal page where you can access over a thousand of BSON books.
    For Style L (recomended for larger devices), click on Portal at the top left to visit the portal page.
  2. Select a book via category, search, or featured titles in the portal page.
  3. From the information page of the selected book, click .

If successful, the book will show up in the Viewer after the importing process is complete.

Nevigation Within an eBook

In addition to the traditional scrolling and swipe, the Viewer employs the unique "Web Books Navigation" for easy access to any part of an eBook. No scroll bar is necessary. Simply click (or touch) at a position in the right, left or bottom edge of the screen.


For Style s, clicking Image will display a menu. Click it again to hide the menu. Clicking Image will display table of contents (TOC). Click it again to hide TOC. For Style L, the button Image at the top right lets you set the background color, font size, and library view (tiles or list).

The button Image is for going to the previous ePage (typically a chapter or section). In Stye L, the button Image is for going back to the ePage that links to the current ePage. You can also use this button to go back to search results. For Style s, the link "Go Back" in the menu has the same function.

Switch Modes

The Viewer supports both paging and scrolling. By default, the mode is set to "paging". In Stye L, clicking on the button Image will switch to another mode. In Style s, the link "Switch Mode" in the menu has the same function. You may switch between the two modes when any ePage is open. However, the change is only temporary. It will be gone after you close the book. To change the mode permanantly for a specific book, go to "Setting".

Remove Books from Library

Books may be removed from the library only in the list view. For Style s, click on Image will immediately remove the title from the library. For Style L, click Image in front of the title will bring up the "Manage the book" page where you can change the category for the book or remove it from the library.


Double click (using mouse) or double tap (using finger) at the paragraph you wish to bookmark. If successful, a red symbol will appear at the beginning of the paragraph. At present, tables and headings cannot be bookmarked.

Please note that the Viewer does not automatically track which book or where in a book you are reading. You must bookmark to let the Viewer know. If a book is bookmarked, clicking on its thumbnail or title in the library will go to the bookmarked position.

Create Highlights, Notes and Links

For mouse devices, use the mouse to select a text. For touch devices, use long press (tap and hold for about 1 second) to select a text. A menu will appear at the bottom for "highlight", "Note" and "Link".

Edit and Delete

The following background colors are used to distinguish different types of mark-ups: Highlights, Notes, and Links. Clicking on Highlights will bring up the option to delete the highlight. Clicking on Notes to view, edit, or delete the note. Clicking on Links will go directly to the linked Web page on the internet.

Highlights, Notes and Links can also be deleted by clicking "X" in their listing which can be accessed from the button Image in Style L or Image (then "Show Notes") in Style s.

Advanced Search

You can find a phrase or multiple separated words in a single book or the entire library (database) on your reading devices. You can also use wildcard * in search inputs to match any characters. For instance, if you type "she walks * beauty" (NO quotation marks), the Viewer can find the ePage containing the Byron's poem "she walks in beauty".

A search input with the wildcard * will be treated as a phrase, not separated words. Therefore, to find a phrase, simply add the wildcard * at the beginning. Example: typing "lion fox" can find the ePage containing "lion" and "fox" at different locations, but "*lion fox" can only find the ePage with "lion" and "fox" together.

In the matched ePages, the matched words are highlighted. An ePage may contain several matches. Clicking a highlighted match will go to the next match.


The BSON Books Viewer disables the intrinsic zoom function (e.g., by dragging with 2 fingers) to prevent text flowing outside the screen, which would require horizontal scrolling to read the whole line of text. This situation is unacceptable by most users. The Viewer provides its own method to enlarge text and images.


To magnify text, simply change the font size from the setting. In style L, click on Image at the top right. In style s, clicking on Image will display a menu that contains "Setting".


Double clicks (or taps) on an image will open the image in a new tab (or window) where you may use the intrinsic method to zoom in or out.

Tables and Equations

As mentioned above, our Viewer does not allow horizontal scrolling. This presents a difficulty for small devices to display large tables or long mathematical equations. Our BSON books are specifically designed to make tables and equations horizontally scrollable.

Add the Viewer to Home Screen

It is recommended that you add the BSON Books Viewer to the home screen, because it will be displayed in FULL SCREEN (the "APP mode") which has more viewing area than the "Browser mode" that typically displays the Web address.


Last updated: May 23, 2021