Add standard command button “New Slide” to custom ribbon in office add-in

Question

I have created my customized ribbon in an addIn. Now I would like to add the New Slide command that exist in home screen (see screenshot below)

Answer 1

I created a new ribbon based on xml Template in VS. Afterwards I added a group and a control based on an idMso-Value. When using this xml file

This results in that custom ribbon. Eugene Astafiev pointed it out, you can find idMso-Values in MSDN.