Ally is a tool which can help promote accessibility and supports both staff and students when using Blackboard.

Ally for Students
Students will now be able to access alternative formats for any documents that’s been uploaded to Blackboard by clicking on the icon. A quick start guide can be accessed here:
https://help.blackboard.com/Ally/Ally_for_LMS/Student/Quick_Start
Ally for Staff
Tutors will be able to see coloured indicators next to the content they’ve uploaded reflecting the level of accessibility for that item.
Ally does not affect the workflow for adding new content to modules and you don’t need to do anything differently when using Blackboard – this is just and extra tool to help manage how accessibility your content is.
The accessibility indicators are only visible to tutors in the module so students won’t see them and are not a reflection of quality, only indicators of accessibility.
More information and training will be provided over the next few months but it you’d like to try this out for yourself the functionality is now there and a quick start guide is available here:
https://help.blackboard.com/Ally/Ally_for_LMS/Instructor/Quick_Start