Ability to customize Excel ribbon
Please provide the ability to customize the Excel ribbon from Office.js (in a task pane add-in).
Add a new tab that appears when workbook is active
Add new ribbon buttons to custom tab
Hook button click event to execute app logic
Set label, tooltip, icon, etc.
We’re happy to say that this is now possible with new add-in commands now available for developer preview. See more at http://dev.office.com/blogs/Introducing-Office-2016-Add-in-commands-Preview-for-Word-and-Excel.
Office Extensibility Team