On 25 Nov 2013, at 3:14, Jacob Carlborg wrote:
[…] What I'm actual was looking for was [a] way to see the SCM diff of the whole project. By default pressing Cmd+Y + a number will only perform that SCM action on the selected file […]
What you probably want here is ⇧⌘A which is “Deselect All” and with no selection, actions should generally work on the entire project.
Related is ⌃⌘R to select the current document.