We have created a report using SSRS 2012 for display on a webpage. It uses grouping, with visibility of grouped levels being controlled by clicking on certain cells in the Tablix. Is there any way of creating the report so that it can be navigated (including
showing and hiding of levels) entirely by the keyboard, with no use of the mouse at all?
From your description, you are looking a shortcut key to control the visibility of the report items, right? There is no such a functionnally to work around this feature in Reporting Services currently.
If you have any concern about this behavior, you can submit a feedback at
http://connect.microsoft.com/SQLServer/Feedback and hope it is resolved in the next release of service pack or product. Your feedback enables Microsoft to make software and services the best that they can be, Microsoft might consider to add this feature
in the following release after official confirmation.