Announcing 4.3 Release

What’s new



:star: In the “Lookup Language Code” dialog, you can now differentiate the language by declaring any of: Script, Region, or Variant (dialect). [Feature Request :heavy_check_mark:]

Edit Tab

:star: You can now record talking books that are diglots or triglots. [Feature Request :heavy_check_mark:]
:star: You can now add an “Instructions Page” to books. These are instructions for book creators, not book readers. They do not have a page number, do not contribute to page number advancement, and do not show up in PDFs, ePUB, or Bloom Reader publications.

Publish Tab

Bloom now uses less memory when creating PDFs, and the “Use Less Memory (Slower)” option should be more effective.


Custom branding packs are part of Bloom Enterprise subscriptions
:star: Branding packs can now have “presets” that pre-fill front or back matter fields with boilerplate text.
:star: It is now possible for a Branding pack to add an image at the top of the Credits page, before the Copyright. This image can contain text, but it won’t be able to adjust to different page sizes.

Experimental Features

This release is a stepping stone for a more complete set of features for making books for those with visual and hearing impairments. These features are marked as:

  • Experimental, meaning that you will only see them if you go to Settings:Advanced:Show Experimental Features
  • Bloom Enterprise, meaning that you must choose a “Bloom Enterprise Project” in Settings:Project. Note that one of the choices there is “Local Community”, which makes all these features free to use for projects which are completely funded by the local community.

Accessible Books for people with visual impairments

This work is funded in part by Book Boost. Note that this is a work in progress, and there are a couple more tools we will be building for Bloom 4.4. This query will show you what is coming.

:star: New Image Description Tool allows you to type in a description of images, so that Talking Books can describe them to blind people.
:star: New Accessibility Checker gives you tools to check that your ePUB is accessible.
:star: The ePUB generator has new options for making accessible books.

Sign Language

You can now use Bloom to make Sign Language books.
One way to use this is to make diglots which people who sign can use to read, and people who read can use to learn to sign.

:star: You can import pre-made videos
:star: You can easily record videos right in Bloom using the new Sign Language Tool
:star: You can start a book with a “Sign Language Template”
:star: You can add “Sign Language Template” pages to a book
:star: You can add custom Video objects to pages, just like you could previously with Text and Picture

At this time, video does not support sound. We know there will be requests for that, but we need to focus on finishing the sign language features.

Note that this is a work in progress, and there are many rough edges that we need to sort out. We are finishing our Sign Language features in Bloom 4.5, currently available for testing in Alpha release.


If you are using Bloom 4.2 Release, Bloom should automatically ask to update itself. Otherwise, Windows users can get 4.3 from the Bloom downloads page. Here are the Linux installation instructions. As usual, you can have the Release & Beta versions installed at the same time , and open books in either one.

If you have any questions about these new features, please ask them here on this forum. If you find bugs, please use Help:Report a Problem and include your book. If you need to use email, please send to