How to modify the "new" submenu in the Eclipse Navigator?

I am pretty new to eclipse. I notice that depending on the Perspective I am in, the new submenu lists different 开发者_如何学Pythonitems in it. Is there a way to pick the items it lists (modifying the perspective) just using the eclipse interface? or am I needing to do a plugin of some sort to enable this.

Go to Window >> Customize Perspective
You should be on the Shortcuts tab and should see a dropdown called Submenus:
Make sure you have the "New" submenu selected and from there you can add New shortcuts.