I am trying out a custom Global Action for Lightning Experience.
I re-read the Release Notes for Spring '16 twice and I think they fixed it to preset 4 actions only (Note/Task/Event/Call) - http://docs.releasenotes.salesforce.com/en-us/spring16/release-notes/rn_sales_productivity_composer_window.htm?edition=&impact=
But then when I go into Global Publisher Action Layout editor - I see that it says, Salesforce1 and Lightning Experience Actions heading and ability to add custom visualforce actions on the layout. But the action does not show up, even if I enable the Visualforce page for Mobile/Salesforce1 in Lightning Experience.
Can someone confirm that this is not open for custom vf based actions? :(