Hi Joshua!
It's not a publicly supported exension area and I've not heard anyone succeeding with an extension although it should be possible. If you really need this I'd look into /cms/ui/edit/edittree.aspx and see what happens there. Otherwise I'd go with a tab-plugin next to the tree (like favorites).
Regards
Linus Ekström
EPiServer Development Team
Hi Joshua
I know you posted this question nearly 8 months ago, but it is possible to do this by using control adapters, more specifically a page adapter.
I have just done this for my PageTypeExtensions project. I add a button to the edit tree right click menu using a page adapter. These have to be registered in an .browser file.
Lee
made a blog post about it here http://world.episerver.com/Blogs/Anders-Hattestad/Dates/2011/6/How-to-change-context-menu-in-the-edit-mode-tree-view/
Croweman and Anders. Thanks for keeping me up to date with these, we ended up just not doing but for futre reference, i am going to use this becuase it is quite useful. I appreciate both of your work and keep it up. You both are top notch. Thanks guys.
I was wondering if anyone knows how to add/remove items from the edit mode page tree right click menu. Could someone help me with adding a new item to the menu or lead me in the right direction. Thanks in advance.