Visio File Protection in IRM

Dear All,

 

I have a document library enabled with IRM. For Word, Excel and PowerPoint Files are completely protected using IRM. But when it comes to Visio, View only users have option to save document using Ctrl+P. As this is a Microsoft product, why document is not fully restricted. How can i restrict view users to print and download option using Ctrl+P. Please help to solve this issue ...